Malicious PDF — malware analysis report

Static analysis result for SHA-256 6435e30fb978ac9a…

MALICIOUS

PDF

41.7 KB Created: 2021-06-25 12:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e9038a148d4316d298307865d2cef4e SHA-1: 4d4d78ad7e9ea637fc3b074abf94af919b156728 SHA-256: 6435e30fb978ac9af6d5e526817fe6222f004c9c9cee7453611305e5f9cb3e29
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to trick users into clicking a link. The document contains numerous links pointing to compromised WordPress sites, which host further malicious PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7113

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 41 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://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/0dcfdaa9845bfd3fe0d41206dde2e287/tivimudarolona.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/3288026645.pdf
    • https://fceresources.com/ckfinder/userfiles/files/zutodurafizivurasek.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d8fbe7e0e---41001547478.pdf
    • https://emilline.dk/ckfinder/userfiles/files/1346402707.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/bd9eefc23f5cf4ad1151ec944425908c/duwikukulales.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/pupipedolali.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609724167a06d---39892672975.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c961babfda---lugujoxaxorutiwebawomokor.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160708609e198d---navifenixiselaleledubetud.pdf
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/vopesole.pdf
    • http://gruaszarate.com/ckfinder/userfiles/files/12845218967.pdf
    • http://www.mostex.sk/files/articles/file/32484608948.pdf
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/95998375953.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ji34une09rnshc8lndhe5fbkn0/16699076152.pdf
    • http://waterreducer.cn/d/files/47738583462.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=rosary+wednesday+audio

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