Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc3e0c0c2f522bf…

MALICIOUS

PDF

49.8 KB Created: 2021-10-17 06:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b546dc0bfb0eed09ba33c022dd6f8d37 SHA-1: 1848ff3a6f92ab3814c6f8c6581c8cf4cd17bf25 SHA-256: dfc3e0c0c2f522bfc8d748b48d0a3ff51a36a0b0dad548a775a34f6e7387ead7
154 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various websites. Some of these URLs are hosted on compromised CMS uploads or disposable domains, indicating a likely intent to lure users to malicious sites for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7013

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 http://kiavysocina.cz/UserFiles/File/10569424424.pdf In PDF document text
    • https://atlanticcompact.org/userfiles/files/goxagutagogiji.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/xaveverixidigojimofiroru.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/49972822500.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/1bfa7281ce203e8da317ba6c779a5f80/14794483762.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20211011120201.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/lapotonux.pdfIn PDF document text
    • https://energooptima.hu/upload/File/68878510032.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/kofatiwilijubux.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/4b47223028b98a5898c93ffe0fba6842/kivibikojada.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/borepaxokomod.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/50909343660.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/81531935237.pdfIn PDF document text
    • http://fittbikese.hu/files/file/27034277508.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/fujevareruderowojiposep.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/91456236171.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/81571764734.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/gvc1phibkptro859352u7ibof5/23861116633.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/xPAns0MRe5M/uplcv?utm_term=a+man+chooses+a+slave+obeys+meaningPDF link annotation

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