Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb422dd0aac8ef2…

MALICIOUS

PDF

53.9 KB Created: 2021-06-19 16:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 499523d17af0ba89fb8f6616774fac43 SHA-1: 3930433b8ef4361961e04ad910c17dcbbc3dc8e4 SHA-256: fbb422dd0aac8ef2fc3e8cb8f9e1578ca947d83dea693b2a8e6033450151c190
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. Heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The embedded URLs suggest a lure related to 'top apps for video editing android', likely to deceive users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5549

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/p3io666f7ighjdqnp9u485e2r4/26239780097.pdf In PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/ug3ukfnlccpmhudtsksi0nkbeh/kezibu.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/d046eb20471c1615a38d508b293799dd/tiralovezefilusowumakefed.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b486ec9db76---82303343427.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/wibojonuxufin.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071122e06c9e---12716788096.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/19124de0d22666a84edfc3d965867844/75352753240.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c46ef1ef39---77332097637.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/d1e4f37d94c56199529cf9e8dbe22aa3/fumibuxijimuxalewunepop.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/m88valfdjjieh01b6vulgh0933/zidugowola.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e36f30d14b1df6e335d5a0a36ada29d/wosonag.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/mtudepgsm6sgl2oats9a64dfc1/tolugagujixonokalezizafol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=top+apps+for+video+editing+androidPDF link annotation

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