Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85f980e47bcfd46…

MALICIOUS

PDF

47.7 KB Created: 2021-05-10 06:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27b79b3ccd7b4630b5dce22bfb38ec12 SHA-1: 271dd938083cd41ee19e32892ced26cb9392a612 SHA-256: f85f980e47bcfd46fc9eff1048aa99bee6c12a30772925c8a16f3ace996382da
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is detected as malicious by ClamAV and ML classifiers, and exhibits characteristics of a phishing lure. It contains a link farm pointing to compromised CMS uploads, suggesting an attempt to host malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7205

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 47 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://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096a61092715---47913176002.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/7e51c30603bfb063bc52baf9efb1cc29/65869047505.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609888cd14a91---33907727564.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4488546ec---fewusubagubutaritapibezi.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/ajlnabutrhl35lqi992r175mu5/93879498564.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/ngofjuf635659abv5hjpehrutb/4631171890.pdf
    • http://etcad.net/np/upfile/file/60147528585.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/eec5e59ee7f2d36046f7c24be0cd7056/botipapijaxujepaxogodibu.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/7a0d7a23949c915d327bf983b82a33fa/85726944867.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0463bee25---37357633668.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160937d7a26140---jofonab.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90d1da224---xavanovexamuwowezegozu.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/4b7d41d7616b48443bacd4905b2cf76b/53761620587.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/fa4f489c370627170a8eb5dea965a9a8/79672295933.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/b512693clgoled4o837bu9ug32/gabes.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/v3tlvno4s3umvpkm76u7376nka/pezomederixofi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=comic+strip+paper+template

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