Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff870fd921ea437…

MALICIOUS

PDF

62.5 KB Created: 2021-04-30 04:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5db46c1ff3ed399394f8736d0a71b42 SHA-1: f39aa25351e6f7cf0668882a2b8243ce12916174 SHA-256: aff870fd921ea437e883326ccfaf6cd1a1c0ca6940437bf752dbac4ad098d91e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. The document contains a link farm pointing to compromised WordPress upload storage, suggesting it is used to host and distribute further malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to trick users into downloading a payload, likely disguised as 'free binary options signals software'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7632

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 https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/f69c7e17f5c1605367ae753399ba0a2b/luvojanepotisaduvakopem.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089eb8c81f13---jefobupuruko.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6432d7a6a---63212319092.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079eb9084af7---nugupibovepudiwo.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c68f11f35f---majitaxakulotorod.pdf
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/244e77d97c728d617f3bf40a404a9c13/51043985412.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b015168560---mepagukerofolevoxikuwumeb.pdf
    • http://amandatravel.com/userfiles/file/jexej.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160736f33086ad---14893196537.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/vtfgp6m1bdu6bpb82b2l7ap0m1/joketimibitogixenuwodat.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/7d04c0f682776a2b35632494cc1d306c/pulaf.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/t1jbe88p7vhv0goq3oko04nmph/dopurivinudomal.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef58c5bdba---36779349868.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/e2bab598ea703491e81eb37b48d6f7d2/95702849843.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160790903c8797---15657877400.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0c763eb23a3959fce1abdb418dc040f4/vuvuwowojuporejerisa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=free+binary+options+signals+software

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