Malicious PDF — malware analysis report

Static analysis result for SHA-256 27741955d635bc79…

MALICIOUS

PDF

64.0 KB Created: 2021-06-29 03:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d801d22fd704611251aec389d7d7f98 SHA-1: 9f9aaf0d4594861013c7f51ae75a1b2109bafbfe SHA-256: 27741955d635bc796b3b55d1937095d72957f86922466d0f31994c838b06142c
174 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an image-only interface and numerous links pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The PDF's structure and link farm indicate a common tactic for distributing malware or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6468

Heuristics 6

  • 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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 64 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/05aa648385a094dea6178606c4c4f8d8/siwagotajubivupekil.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/f0eoorok1juajt2tebco855p98/78227506324.pdf
    • https://rsun.pro/admin/ckfinder/userfiles/files/29300889889.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/d90296c879e97bd560450a115590efd6/61747016964.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb7a36a076---dokos.pdf
    • https://advance-pack.com/editor_upload/file/bapipazikadedorasiz.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/5nv6blr3r028dcshdjgul6e19l/vawejavisepop.pdf
    • http://uelzecht.lu/userfiles/files/23438144475.pdf
    • https://cortopolis.ar/userfiles/file/pumaxasabakorijona.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098dda052d08---lonesosezomobimidigize.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608591c3593bc---siletigorogopuzonof.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ji13ohbpvho9gao1306qnraoq7/gajixoxivogo.pdf
    • http://interwork.sk/userfiles/file/kizabi.pdf
    • http://beveragesgs.com/userfiles/file/54409885454.pdf
    • https://nffcd.org/userfiles/files/69238308063.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/dm332vom6oo1mida3if3imk093/jukakuv.pdf
    • http://ronaldtan.nl/images/photo/82898383409.pdf
    • http://s-moonlight.com/CKEdit/upload/files/80124261487.pdf
    • http://kardelendalgicpompa.com/uploadfiles/file/jopezotokom.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a56b9a659e9---50065416662.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d386a5c767f---bubusek.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/ddefaa8c1c6266687f744f0a140ee961/29844273972.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=kosher+paradise+temple+fortune

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