Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc07a2a791727e24…

MALICIOUS

PDF

104.0 KB Created: 2021-09-06 20:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0a82cafbfd4a2753a1a3c0620598ea19 SHA-1: c354c47500fd5bac60345793da2bb035659b5753 SHA-256: bc07a2a791727e24daa8641a6ba2a0262fc312297ba14112cb43f93077a1b9ea
154 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests the document's primary purpose is to facilitate initial access via malicious links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8252

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://krisoc.ru/uplcv?utm_term=medidas+de+dispersion+pdf+unam PDF link annotation
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f98eb7e49cc---kerimefutafevuzodabile.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc3547bed3---63195859716.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202107/1625536032.pdfIn PDF document text
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/fasevutabere.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810b4cda250---zefipoxorasofixizevik.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089683f1d3d1---maxilesi.pdfIn PDF document text
    • http://bacsionline.net/userfiles/file/95032211637.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f74cfa826879bc4db0b7b002f5f78609/momorunisopilexi.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a33f4b86b---71732811660.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c728ff2dbc9---retemedebekuxexodutuzug.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c727c28d0ca---jajoxi.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/tewalomefabovebimixibite.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/ritaxazani.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089cbcb4f796---vemiwafufinalekupiruviwo.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/60699839722.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/28630994053.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/bizowitugegabivuxogonegar.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/vadimape.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/5671cn2uj43t95bfpojk7edubj/fabewoverunazabitujudupo.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/92496402193.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/acpaokvlg85nbp56vst15o16ic/94682894083.pdfIn PDF document text
    • http://platcometals.com/images/file/gobivo.pdfIn PDF document text
    • http://waypl.pl/upload/File/sitejozo.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/weniz.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/42054915247.pdfIn PDF document text

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