Malicious PDF — malware analysis report

Static analysis result for SHA-256 04bdf46d0c0337ef…

MALICIOUS

PDF

41.7 KB Created: 2021-08-24 07:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92f1651718ede30b39807198e4c26933 SHA-1: f8e3efe2ff8ce9b10802e3d9f289285dd39fa723 SHA-256: 04bdf46d0c0337eff393c776b2982e64ae6f1b8e33502f79bc0c5dd58627b224
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as a phishing lure due to its image-only content and embedded action trigger, typical of a screenshot lure. It contains numerous links pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7147

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://chcial.ru/uplcv?utm_term=career+chart+after+12th+commerce+pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610411be5f060---65166300889.pdf
    • http://thegioidahoacuong.com/uploads/image/files/sokovofofupir.pdf
    • http://posicert.com/upload_fck/file/2021-8-9/20210809145812440320.pdf
    • https://ascinfratech.com/clientprojects/trading/file/89393714097.pdf
    • http://pensionpoint.cz/userfiles/files/46096238889.pdf
    • https://stallion-international.com/userfiles/file/83736076484.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf4a006a3---xozusoxefamiribavux.pdf
    • http://foodchemsino.com/d/files/7556601378.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c73d23a323---94171735359.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b61c1cfb2---dejariluw.pdf
    • https://syntellect.ru/Repository/file/1150214886.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/79838421c440c16265d5ae2f8df386d7/zimagesovixawofobuzufu.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e211bc37d---dupenolukuk.pdf
    • https://filetorme.com/upload/files/fularomipepuporikaw.pdf
    • http://pokwuttibut.com/file_media/file_image/file/maxafawuku.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/18a2fc322aa9fc842ab5f4c94985ea58/6614564847.pdf
    • http://desushibar.com/userfiles/file/wojemaveposemazupebamusem.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb89670017a---pidizasepamisomofupupox.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/7r94a1aslv4n6paalfdd0j1sgr/79484714456.pdf
    • http://udaybharat.in/ckfinder/userfiles/files/47623901825.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89e387a35c---68164125004.pdf
    • http://thienlongadv.com/upload/files/64737134713.pdf
    • http://jp-cable.com/d/files/wufatunowotisizobeter.pdf

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