Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab12fa005fb3b78…

MALICIOUS

PDF

82.5 KB Created: 2021-06-26 11:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a04a28d1e66bc069fe88dccffe97a17 SHA-1: 6abda723dfe8cdf560bce374db2fbef413830fdf SHA-256: dab12fa005fb3b78e59e569148575567d2f1646fb98a3a7dd4be4af92308bb67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the primary function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://smidgel.ru/uplcv?utm_term=termination+due+to+redundancy+letter
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/gqq4ir2a02fdl1hmbqjbc1bh26/kajel.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160ac311fd0844---72575305392.pdf
    • https://rivaflo-south.in/userfiles/files/rirufifebozetovelijixum.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a2165c302---29001715951.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f55e81c8c2---51584878016.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/jbeqg03mnpdlsj8b1qmmksjf3t/83353663360.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607da7a834823---99323569199.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/b81cer3rmtgm2gjpuj6u6eikq7/44982736730.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f6ab13c94---nexevuwimum.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/bf9e0e3d18f02778bc5f3afa5a19c978/3494989575.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/29e79cd6fb38c40974140b4f08470e19/ratisalokoxutumil.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c468c433d7---vejumibelosawux.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b575bf73cdd5008595803a4c2779abc1/73737023767.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/cb33191fd160d9d2671732d8d589e5fe/98240630912.pdf
    • https://mahae.hu/files/files/6481799379.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/e2c97ffc97b38b558d2bd6e3f0d004d0/sikujusuzisirupuw.pdf
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/funk9g2rignkftvblseq7pgs4g/pizekabemajaku.pdf
    • http://www.allatpatikapecs.hu/images/file/bofaxumawekixuvikawopoji.pdf
    • https://comobrew.com/newsite/images/user_uploads/file/gasoniritusugutisabesi.pdf
    • https://unosms.us/userfiles/file/55284598175.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/922663d33b285de617be549d8bf35c4a/xewowemaropofinifuxat.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160858b81a901c---fadobozatusi.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_off0000e1f4.bin
79c6501f126441413f54cd0805b6289d2ef75b3b0d7199fe3e69db7e37123883
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F4 16436 bytes
font_01_sfnt_off00010cad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAD 16792 bytes
font_02_sfnt_off000124c4.bin
e0bc3ddbc169b4412759e7d6dda715d77c5dee3ae4abef5c46d58580ead6f183
pdf-font-stream PDF embedded font (sfnt) at offset 0x124C4 10540 bytes