Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2a001f19157167…

MALICIOUS

PDF

92.9 KB Created: 2021-08-09 02:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f7863b79c69cf31331c9f74a06bb9f97 SHA-1: 7f6fb2e3e27e9a32aaa4823c1f87ee8ca9bd9296 SHA-256: 1d2a001f19157167c4f756f3b6e8244f5ef13415dacbd623af6e5c1db415a4bf
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or trojan delivery mechanism. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://pistant.ru/uplcv?utm_term=the+giver+chapter+19+analysis PDF link annotation
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089496f7775f---dasevuwajakexokesezop.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf36698bed---xozurowaxatuvob.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/guwew.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/0a818aba30e51c5a01a3ec4322fbfac6/wovawix.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/s4au36tvbcq86rpqlt81nosbo6/31987852230.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/8a7645a59c5468b3a2e9456885d8e203/96206164653.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/sozujomuwiwuwog.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/lgk95qnl74b3s89l326abgkm4p/35061290870.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/42938064364.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f5ad743b---genusi.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/bepaxopibinoxigumaporowi.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e44b6fbbc---jenikojadi.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/benigorosowituzu.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160adc4f0374dd---siguvinaxazifilosiw.pdfIn PDF document text
    • http://firegallery.ru/img/upload/pugadegux.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/72487067393.pdfIn PDF document text
    • http://doverhighschoolhalloffame.com/clients/2/2d/2d76883e1086210ef8e2c43836b0327f/File/75503294204.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/46444900735.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/45915806960.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/6012011131.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/paxekudesiwijulevadawuve.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/96686477a13ea1e519b4623c9fa74707/8927379336.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/64390912345.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/09edb8de3a6fe5c1bb753bb02d69d541/20486905862.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/kitifetepuwaxajuvot.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/31b4dbffa092650a2a0c281cbb3b16f5/62545970195.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10667 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7E 10896 bytes
SHA-256: 5517ff52c30d39e490d9f1ea01fe34f39212eb7c566459df5fb35c3581f5b942
font_02_sfnt_off000137c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C2 17428 bytes
SHA-256: 693d040c7da339bd643408185ce3b987bb0b13bf9daabce284c85c956c69e784

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