Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fef82d7dd200006…

MALICIOUS

PDF

80.7 KB Created: 2021-07-03 17:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 771ce5c65c7cfac3937a3090ee843688 SHA-1: 4e0cd729455bb9e89040eb763fc5e6e37b5f99d0 SHA-256: 6fef82d7dd200006fd42a1d7d5dab6548a615794df78c366f79169ec890081f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs and link farm heuristics, indicating it is designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or malware distribution intent. Although no scripts were explicitly extracted, the nature of the PDF and its embedded links point towards an attempt to lure users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://laborke.ru/uplcv?utm_term=chapter+test+form+b+geometry+answers PDF link annotation
    • http://safarang.com/basefile/files/33763956214.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/fc0c032538b9ff1ed8264e32ce640e60/matibeboxizazumaxevigoxi.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/99c634cd5fd36bfdfb61bb976e8b3a73/81771689063.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/66349100394.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/equ2shmi3h9sn7l6lghedoes7m/49854120455.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/a2dc24da517ce442294cdcafe4403323/sazolewegogevafiledivev.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/jovit.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f387270eb4---70862815294.pdfIn PDF document text
    • http://aps-mes.com/files/file/fodateke.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/a30f432c84be2249d60bc3e7490ab894/58127574888.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/763f56310e88ebf4e76fe120b1f85317/97690439641.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160ad049a5d706---31700640529.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091c1a13bd97---98471379164.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/62920521415.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/90683084355.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16098b87e38da3---42675686651.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202106241256529647.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/biwomosunevaluzoz.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f09a8e4a5---90307065428.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160968c2e67b28---41461103692.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/64868088465.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_off0000d2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A7 18672 bytes
SHA-256: 42bd5ca50b37dbcba89f7020bb8df50ea908bf6dabd3a07e62234a396dce31cd
font_01_sfnt_off00010434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10434 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4B 11040 bytes
SHA-256: 31a1a5f833486c12a725f9c69f6363366d6db094b99347f827a37f79971e59c3

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