Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e1c1dff6965d49…

MALICIOUS

PDF

200.0 KB Created: 2021-06-29 11:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 891f9bb041312423ce7b313894925d4e SHA-1: 8b391653963c4424468b5fd670221d9d252bd1c3 SHA-256: e8e1c1dff6965d499b04af9d629b8d9ccdf3544e6172d97b46d986a52ac24b6a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a phishing lure, indicated by heuristics flagging it as a 'free-download phishing' attempt and a 'compromised CMS upload link farm'. The presence of urgency language further supports this, suggesting the user is prompted to click a link that likely leads to a malicious site. The ClamAV detection as 'Pdf.Phishing.Trojan' reinforces the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607583aa39008---vasegatapifusasupugexupet.pdf In PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/f607beda16331218c8c2817d4469e05a/xadasijusetat.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/ea9016815eeb6a26805f14d900a3ee5c/56848373192.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/65144946446.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/topenopowozebusapo.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975f2ae959d---wifukudufarer.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/3c24d79781f2c58b2ebfbc77fb26cdd6/jivonojubuwep.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b8dc14cc6---ropozik.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/4c67de6e31cd3ec5cca1f1958baf128f/44980139512.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c510e294d---9596224165.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ab49ca8853c---39609611127.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a7a85acaa9c76aad6ecb639c4da5fb6a/pugiliwaba.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/zonubatupudazud.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfcad90753---wanixerewaronegameromeza.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d5585b1f3---92918893928.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/2691ca8a265b836d9b390ab8b384842c/71587719796.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b285bcf2612---97435230947.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/b652d6d97d3d66b21165cf603f408b9a/fetoxumimitojiku.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/65ca2b44bbc42bb5af70a8c7751a36f8/pelalowatigadatawuragi.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/4592bf7ab5471062cbbe1e5816e01edd/kezefusilegejedopawevejil.pdfIn PDF document text
    • https://studiorampinelli.com/file/gukapulidajadasizo.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/ps57rjeg301tt1505euahttrr1/99241646349.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0bcf3900f---36127533580.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/c8b550d0acdbc0651c3f360beaf319ef/topimo.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/227270bb45aada91f7ff086bbeb11e42/79157809742.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7299ae680---gokupo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=oci+status+under+process+at+embassyPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002ab6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB6E 11008 bytes
SHA-256: 482c9f7ffb8b1684db4f2361ee648fbf4378d97fa46bda892fc539e1e317821d
font_01_sfnt_off0002c4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002dcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCF3 19424 bytes
SHA-256: e8aecce559736a7a9b9416690652f40aa92c09d9074cd703cb7b3b1e4e0449b9