Malicious PDF — malware analysis report

Static analysis result for SHA-256 9606599a5073829e…

MALICIOUS

PDF

108.1 KB Created: 2021-06-29 08:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f50769ac0ee209795a3f10c7f5f93359 SHA-1: cf9bbee06bd2a9a3f3137e8a039c53a6139f9a4c SHA-256: 9606599a5073829eaa7b7fec076ccc6fff65ebdd4bb3a9a604f90d246cd8603d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • 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
  • 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://coretry.ru/uplcv?utm_term=lord+of+the+rings+2+full+movie
    • http://slp70.com/clients/873855/File/33623114951.pdf
    • http://beloezoloto.ru/userfiles/file/lasanamazadasanitejeva.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a381137f262---dojepafikemutulu.pdf
    • http://stalmost.pl/userfiles/file/65771941204.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/eba68bdbec5cd15f6c4c8ad049b5d43d/fipiloxovosiza.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/v90doeueugs484p4286c5qhj6n/tajowusabigo.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/palugeludokevabolerex.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3493eeacee---79047081395.pdf
    • http://dyglas.com/userData/board/file/79454881148.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c21c4793ae---kiretasapusotedidipudove.pdf
    • http://ck-tct.ru/userfiles/file/45558349414.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3947d863a---gibagomawepoje.pdf
    • https://dalilak1.com/userfiles/file/xixuwosuwufazifavaje.pdf
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/55081099381.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6990979ca---10170719955.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a164828ccaf---56902227732.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16095f7dce3408---60004665069.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082b19509e6e---34272432789.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b33d1f4cc---xatisagiro.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5a8e2b797e---77789317064.pdf
    • http://oreade-breche.fr/userfiles/file/84774050503.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d904da0856---69007798893.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/8ddfe28d618b3636c7581acd9d4c9f9d/mogebetog.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c3eb487e613---xaneko.pdf
    • http://nebovsem.ru/app/webroot/files/files/42056085824.pdf
    • http://malagi.pl/user-files/fck/file/91175923706.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014281.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14281 16792 bytes
font_01_sfnt_off00015a93.bin
fcdbb414ea0f89269e940edeb361acaea9496555599ef2a8da56238358a44986
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A93 18428 bytes
font_02_sfnt_off00018a09.bin
d85ebef61098ce69f9c99d830f6d31f9167d987a2001a4fe81a82e9ebee256af
pdf-font-stream PDF embedded font (sfnt) at offset 0x18A09 10880 bytes