Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d93e10e10f9afa…

MALICIOUS

PDF

71.9 KB Created: 2021-06-14 08:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b4f338a47b4dae086e7734227dcb886 SHA-1: c58ca4894d6256e54e6b917dca9362c6e883f1be SHA-256: 14d93e10e10f9afa35e04d9bee608bc3212f4d4bbfe9000050a0964f2aa5a486
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links points to a likely attempt to distribute malware or phish for credentials.

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://drafthe.ru/uplcv?utm_term=marvel+universe+in+order
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c331425d9f5---lipadalevop.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/b9638f36ec900db9ebc2582f8e0a275e/96160273149.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/36244b3593f2ef3768ba1e7c84496bae/49966291736.pdf
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/a78e69ad303c0d57a57e219851cd812e/99270914764.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdb0741c06---wilepanogiwe.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089099020a00---30619335185.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/e3bfe85b14caeef821be0a779c61d980/supizuliginejuji.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abff6d92745---16765974872.pdf
    • http://eltonltd.ru/sites/default/files/uploads/8418512899.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160770c5e397f8---majiputodaz.pdf
    • http://beveragesgs.com/userfiles/file/14300048103.pdf
    • https://readandenjoy.ae/userfiles/files/70337895569.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a02bf6d91c3---tobewotomiloxunejakisa.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/a7f5a2d906a24f9c660f413e53061bd5/87392886440.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/c4e11a9943802883d2df90036f95c1cd/vazinavukom.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_off0000ddac.bin
7d83cd3f97a9815ee6a4c078fb1d88b6a05fcbc5d5260dd2a89d7082628a9aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAC 4884 bytes
font_01_sfnt_off0000ee63.bin
a099e6c434bfa52484a5c5146fe5cb47779ff79fd0a6046b7e54952058482c6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 11012 bytes

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