Malicious PDF — malware analysis report

Static analysis result for SHA-256 503353a2aa55bf14…

MALICIOUS

PDF

42.8 KB Created: 2021-09-18 14:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a1d689f1618345d05b9370dbd9caada SHA-1: 281c7ae63b144ab3f295894592f7e9e6b14e0cd2 SHA-256: 503353a2aa55bf145f701451b619190fa2c32d9a87cbe4cab5ab1dafcd12b628
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a PDF link farm, with multiple URLs pointing to potentially compromised or disposable hosting. The presence of numerous unknown URLs suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9566

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://phdpecs.hu/userfiles/files/mikumofatelepivikopup.pdf
    • https://gaadalagi.com/contents/files/bomaxetilogixusexuduzus.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/kqof82p7n1uhje204nutkv74um/38649501104.pdf
    • http://kompassztuki.pl/Image/files/98912211078.pdf
    • http://opuspointpartners.com/ckfinder/userfiles/files/51528777680.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136789ae7223---17648817428.pdf
    • http://fygl.net/uploads/file/011920293267.pdf
    • http://yepuco.com/uploads/files/laxakenatimekurajamuwele.pdf
    • https://www.leasing.net.in/ckfinder/userfiles/files/piramasavu.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/8c1ea476d1856e9b21ace63b34029b83/32363353568.pdf
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/35552638463.pdf
    • http://hawaiianhunareiki.it/file/fomawalesib.pdf
    • http://thedewakohchang.com/image/upload/File/4574100293.pdf
    • http://walosports.cl/userfiles/file/rexukuvebedixu.pdf
    • http://eurekaelearning.com/upload/news/file/11801493198.pdf
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/32280584686.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=weyland+yutani+android

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