Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2c111b3478c2d9…

MALICIOUS

PDF

273.6 KB Created: 2021-07-03 18:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 64e7e6e54e5288ae64434992c550a62b SHA-1: 54afc377c1c81292e9b64dfdc1d4eabd83f2495c SHA-256: af2c111b3478c2d9557cdbee6f58bc8f283daa2a580c0059d8781757f700b89e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a phishing lure, including a link farm pointing to compromised WordPress uploads and SEO redirectors. The ML classifier also flagged it as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs suggests the document is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9580

Heuristics 7

  • 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.
  • 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 https://ketchas.ru/uplcv?utm_term=typescript+nested+interface PDF link annotation
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2417924ec8---makopumefisamupolumivav.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/mogajadasojirapun.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/logumerisex.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/wijen.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160baff5ce5d8f---sinososeluwoximizowuromi.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/sezawisaxuxoki.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/lunibudavudagazax.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9d5fabcef---88493433539.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070fd5cb5583---bexunizozuwokopakum.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/qoug8dmvcqsmeroo1j3a5ojbtt/perexunubigibup.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/51eb0f7b7e65ca87dee4e772b4959d0d/xuzeses.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/40089901014.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/72064409514.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/folidameka.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/bf51c2cb8ab062a7d5fbb0a7ee0db162/pebeg.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/2ca2fdbaa5d038a2149f7dd9b0616010/zuwofimemudozadigiwozax.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/lununagujidotawezige.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7147a1558---retixisexumonanumugesuz.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/82673135649.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb38dceb835---25451298717.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088dbcc90f9d---45843344281.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/52721063556.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083624495ed3---57023000642.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/mowarijuze.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/1cb0c554da13d1b058457770a4408b52/valinanutajefemurenilom.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/2dbe556dabc6ca8da96fa41bf52665e8/73296123573.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/16316180387.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00038282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38282 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00039a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39A99 10524 bytes
SHA-256: 0bd0c5e76f3e36684e8d96c63ad150e2ff4e7f25c002701cd1e18e96be829810
font_02_sfnt_off0003b2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B2B2 16296 bytes
SHA-256: 0386a1c13e6e24afeae3a6e9ab8ec32f3cbcd5598a0e2bd3099080bd2aaca191
font_03_sfnt_off0003c8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C8A5 11708 bytes
SHA-256: 4ab08a0b9eb14f7918eff467a6b2e57a1fb92e6fe08d45483792ef90d540e986
font_04_sfnt_off0003ef4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3EF4D 28828 bytes
SHA-256: 237d352424531fc55d860357969eb151bef9bbb276b043e9a8cc09a84e9f6dfc