Malicious PDF — malware analysis report

Static analysis result for SHA-256 534232730d77eb80…

MALICIOUS

PDF

40.3 KB Created: 2021-07-21 14:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b0d78207db41ff4cd0fe1301e8f6b882 SHA-1: 7ef162ffb449bec645db8be3c2bc737b89eac8a2 SHA-256: 534232730d77eb80206f1a5f56e2d69ec7344eb46b6a7580ae4aae1d7b435eec
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to conceal clickable links. The document hosts a link farm pointing to multiple distinct domains, many of which appear to be compromised CMS uploads, suggesting an attempt to distribute malicious content or redirect users to phishing sites. No scripts were extracted, but the presence of numerous external URIs indicates a strong likelihood of redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9743

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 40 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 http://davcpundri.com/css/file/lifovixukapowunitulidovab.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3768af8e6---ratadigexevozerudunefaje.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/zodigupuzorudifulovan.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16079c26fcc10e---10586849901.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/e6i47rgocm10ca3ghjcev7s2ie/fovofabufanexizulojox.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/f3b3777db72a7c308db041e33596c813/2423952471.pdfIn PDF document text
    • http://rafaelokazakov.com/file/pavibarutesok.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/5fijon5on8cfuriq0qt8vf6hc2/kilidutale.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/06e413c97e9b74d837fbbf15f561563c/nakonipifiz.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607175c4eeba0---juxiva.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608579e0b8e42---55385690800.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c63729967c---makogajividesep.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/75927154812.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/47667320766.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/17747637955.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/kigexibotujoli.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/badae9d5c136393c43e86ca8008a9adc/totevafupegexapadab.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/37037072909.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/raxuwoxowomaraj.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/peridekipivagak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=international+draughts+onlinePDF link annotation

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