Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa30ed6b41d6f00…

MALICIOUS

PDF

79.6 KB Created: 2021-06-15 21:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8b999d6a8521d219a86c73df2382457 SHA-1: d26ac48dee0f5fcfdcf0d4ebe5ea62961c7387ea SHA-256: 7fa30ed6b41d6f00189c0ce93411daf4050021cd1bcb8ed1d1c72d3bd8611e37
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing campaign. The presence of 'utm_term' parameters in some URLs further supports the idea of tracking user interactions for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6542

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://coretry.ru/uplcv?utm_term=6th+grade+multi+step+word+problems
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ln146hbt6n1hahprvu5mth5uav/67092742951.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a57be0c8009---nusigofiwotosiroxixawed.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/10198816b90d6ae8536fb228de877a9a/dopakuditafogafiteteve.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/ea106391a293d662c786755908471b65/79579045051.pdf
    • http://aqbnb.com/uploadfile/file/15126814647.pdf
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/l82n75186gibg6leip30qho6oo/99536019867.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/5ab567aed45d7b36012276b03e7bf2ec/60390015922.pdf
    • http://ackerviewguesthouse.com/userfiles/file/86646729145.pdf
    • https://vayamcs.com/content_files/files/kenowelimivof.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2426ce7024---77069211788.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7skqif113qnlkmhpgljs3pvbh5/ruvonawiwevor.pdf
    • http://poorclarescork.ie/images/jokonadibedejazuxejisa.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/1d1517cf6199a45327bea90200de0b82/zusutadamujulu.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/0634a17adf6ef1a57f2df278de01fe27/rovasuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ce.bin
6ea7c6d26e83f30836600f5ea72b307e4873b89ec3b2c92b84e612d581014c08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CE 5664 bytes
font_01_sfnt_off00010af2.bin
04f3abcda9211b574f99fcebfcd66b25f21bbafbca49474b0f2feab2844c156d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF2 11340 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.