Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac920f3923952d0…

MALICIOUS

PDF

62.0 KB Created: 2021-09-13 16:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c15b66bfc5778677c59c021878ffa25a SHA-1: 972cf244ac867b2369636195739171a1fa1123d5 SHA-256: 2ac920f3923952d0cd0597a33c0fd732dbf5e7b00968817e7988de7ff39ab40c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a strategy to obscure the true destination or distribute content across many low-reputation sites. While no scripts were explicitly extracted, the nature of the PDF and its numerous links strongly suggests it is used to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5048

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://abwmountvernon.com/uploads/files/79513752333.pdf In PDF document text
    • https://carsen.sk/editor_uploads/system/files/vinuwugopilukipu.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/sobixexirirebokupur.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/161370e0e9b615---woxusupevupi.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/siwupukavilojolojijiba.pdfIn PDF document text
    • http://sun-eko.eu/files/file/rujutirapisojuzepitas.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/85508568754.pdfIn PDF document text
    • http://usagimatur.com/files/others/71446506357.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/jemiwuz.pdfIn PDF document text
    • http://ssss-sangam.com/userfiles/file/vufutedawof.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/68466360004.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/37772433701.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/zikuxikunisijofuv.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/45010766296.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/neganafat.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/09/06/fepeka.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/94800174676.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/3302552612.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/38836750593.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388fc66d465---dirumugemada.pdfIn PDF document text
    • http://orderkai.com/uploads/files/56359124364.pdfIn PDF document text
    • http://mosjob.ru/images/file/xisawo.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/43465477327.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/nakawufutet.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/94595062072.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=past+simple+of+to+be+exercises+pdfPDF link annotation

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