Malicious PDF — malware analysis report

Static analysis result for SHA-256 4958e7d44f0c9aa7…

MALICIOUS

PDF

44.1 KB Created: 2021-09-07 01:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e59270f36d1537bb7c603d77b3168939 SHA-1: 072bccdd2e37b559e0ac80a03dbf4196ee23d9d3 SHA-256: 4958e7d44f0c9aa78dd437c296d2d13b4d5b036c1301f49c58f3f8f2d31cccd8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains. Several heuristics indicate the presence of a link farm, including compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final destination. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4839

Heuristics 5

  • 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.
  • 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 http://xn--2-140-swe8h.xn--p1ai/files/sukife.pdf In PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/xogokuzatafasajozuta.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e1319b9f40b---62455001991.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/8fb6a7e19051447cb7876f95cfbb02f5/52173096282.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/67031910993.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f27f043451---40907068992.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/zawowuneje.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/36fb4cae2f429bfa84cb58fddfe8423f/71779070821.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06af48c416---zowibugogitezule.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db64a2d9ff9---guxesodojujakizotasog.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/9e7a9deb9943924ade688c9c15cb7d92/mefibutipeve.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/widimorasutone.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/58us3lk0d1cng9uuuclhqk5gq7/70437023921.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/71260189064.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/2u97ertd3qo1v09ob4fb2kfne4/23605099942.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/d8f8b1c84e2f4c0a314fa390ea33ba5c/tusudo.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/90315900475.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d0853b49d4d---60749081670.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/piloweworelidefudagi.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160948360f415e---nuwedunedosubi.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/98204293390.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/80429054251.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/d44c026562851cb07afa677f1159e805/75959577564.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=lspdfr+gta+5+versionPDF link annotation

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