Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c50b28ed27cf26…

MALICIOUS

PDF

79.4 KB Created: 2021-06-18 17:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1651f24576162ab1041fa724878d6e24 SHA-1: 884c29c75a3dbf257ea0a35126b003772340a753 SHA-256: f1c50b28ed27cf26e81530f73aa474d7883fe937fc010b63385c0682f16fe4ff
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to fitness, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://infrive.ru/uplcv?utm_term=hiit+treadmill+walking+workout+for+beginners
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e73f4e576b---60688162412.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11d33c84df---12593168421.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c57a2105f0c---44592744586.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/b06309b46c2e677f5396cc9ea24754f1/dadexujitisiwudubam.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/kp86dn4tb4esnu2fjct1h1dil7/vulefaj.pdf
    • https://tenekedjieva.com/uploads/file/tafitomu.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a410b80365c---23622119472.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/gmido0s49rf6bqfkoee7198rn3/kikakugevigewokekav.pdf
    • https://xanbiente.de/userfiles/file/79865360729.pdf
    • http://growlink.biz/userfiles/file/85524023851.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b16d478ec---pidezagifalif.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608260e36a418---momasutatofetolino.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbef76da29---retidudaxovisoro.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/u7ktrkjdfdej7m3vt4cond578d/bosoruzurajujax.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/ldp3qemibsjbph6pqn6v9qr1om/77015358492.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3910fb9097---27772887033.pdf
    • http://cuatro-pr.org/sites/default/files/file/39583254330.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f973.bin
3f6e0c19992e7f263143266a2e8b8f3eee457ba2e6ceeb52f845b0c6925af5d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF973 5484 bytes
font_01_sfnt_off00010c16.bin
38c111726e8b30a0a60ca0b2614e3330e0f61b770f0d575a83fe0663107f06b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C16 10692 bytes

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