Malicious PDF — malware analysis report

Static analysis result for SHA-256 e232784c8b2df20d…

MALICIOUS

PDF

95.9 KB Created: 2021-08-01 04:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 26f16fa169a0b7ebc13f22774bc47ca0 SHA-1: ac39e072689703297abc5e746fb941691c38bda9 SHA-256: e232784c8b2df20d2ff68c96dcb6478554c018d0daa2af0d85edc7028fe2deb4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged by ClamAV as a phishing trojan. It contains a large number of links pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the ML classifier's high confidence further support a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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
  • 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://drafthe.ru/uplcv?utm_term=how+to+set+up+the+blink+xt2+camera PDF link annotation
    • http://tasarimak.net/ckfinder/userfiles/files/wimujepezutewu.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/gag0ukc8qn545vog0k0de8s7vc/4071217174.pdfIn PDF document text
    • http://hillhouseclassof1961.com/clients/c/c9/c9b049383fb65e98d0a4dcab6c176392/File/wazezawesoludobakiwo.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/lavevujoxagozep.pdfIn PDF document text
    • https://telenovella-bg.com/files/vilexupa.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/94757800479.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607714c7d1c31---vafiwolujofifagub.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/dc3ffaa0becfad8c0939f0f7333f48dd/62434255316.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/949e1f76d2c235724fe6be352b40fb16/sodaponojito.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16072c1974dfac---fegejorumiwuzinuj.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/watozakepidopopezajidowi.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/090c9d1e07d02028cea3c9efe27642ca/tovidopevabixiwiganuzozo.pdfIn PDF document text
    • https://brod-plovdiv.com/images/fokaxijufim.pdfIn PDF document text
    • http://siembra.me/uploads/files/51339607723.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5224b4da569dbda99cbbe025e9ae6c7/rubogamudipodozawimatam.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/2l9ohs653islu6i1en60lpgo2o/pobisafewava.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/eacebcabjj8ktgcda2i183tdmf/rikiloze.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae082142d3---zijefuge.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec22b4d01e---45274976695.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd56dd01df2---dupefevabubuxaw.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/bufodawitigagejekirava.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b5e891e52---zoxube.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/24947653137.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/n9enr9flab7nk080af88ntsue2/kofufobakawin.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/memigekotuluboxuselo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001109d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000128af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AF 17464 bytes
SHA-256: 0fc42a77715cceee664af25795b14af6534ccfad31850c5e0779c6c76c01b4f7
font_02_sfnt_off00015681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15681 11272 bytes
SHA-256: 51d4eb8c377bb2f9fa7c95d5d664c1270d22c4a59174d4a450962aadba3a5a6d

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