Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e2ee9eaeef8665…

MALICIOUS

PDF

75.6 KB Created: 2021-02-05 00:00:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: dc556d1e53e20d48cd375b90e51e23b4 SHA-1: 75fdfff4fdc7246daa341bab57815948bead0211 SHA-256: 95e2ee9eaeef8665547f4f50ee953076849285a318287c938bea282091b6fc87
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded JavaScript, though not directly analyzed here, is a common vector for malicious PDF exploitation.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=5e+mind+blank PDF link annotation
    • https://cdn.sqhk.co/ruvonusebex/ObVhaNV/gumajefudefuwoxoxexevu.pdfIn PDF document text
    • https://pezujereg.weebly.com/uploads/1/3/5/3/135349759/eedc757581d3.pdfIn PDF document text
    • https://barezixajeg.weebly.com/uploads/1/3/4/3/134318527/zivevax-todamovuduwudo-pobuziniwowixeb.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/fhhhexD/beast_quest_gameplay_switch.pdfIn PDF document text
    • https://zunodeni.weebly.com/uploads/1/3/1/0/131070331/dabusinurile.pdfIn PDF document text
    • https://xapitutas.weebly.com/uploads/1/3/0/8/130813648/79328c1.pdfIn PDF document text
    • https://kesegupopu.weebly.com/uploads/1/3/4/1/134131766/lowagivesuzasuvevo.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/Uii0hjS/26831088845.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/jF09V5Z/javidoduxenonazonus.pdfIn PDF document text
    • https://kigodebilak.weebly.com/uploads/1/3/5/2/135297846/2288339.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/ajeQ6jg/ice_cream_truck_rental_for_parties_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/kurutuxerodi/fhdKCii/33606411653.pdfIn PDF document text
    • https://luxefelukij.weebly.com/uploads/1/3/0/7/130775337/4993235.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/jhhhV1r/wechat_ban_date_in_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/eKSjhhi/download_game_crash_arena_turbo_stars_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/giigidx/splendor_plus_bike_online_rate.pdfIn PDF document text
    • https://bajewenizuku.weebly.com/uploads/1/3/4/4/134475359/3ae33f9a53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA26 4932 bytes
SHA-256: 4ba024da31e2b163e9936d113b2a3baaf96b3c164c58381e38b7eb6c63d7cf8c
font_01_sfnt_off0000fadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADB 11288 bytes
SHA-256: 75ce9119b00e812f244b32aa2d3149856ef78899e89ba15b5f30211e38561a6f

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