Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0f4b7ea7cb18bb…

MALICIOUS

PDF

72.4 KB Created: 2021-03-01 08:03:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 262caab2d4e8aa3c8f3c6d2784522d35 SHA-1: b1dd53b22e12ff45e8985684615d4cd6030c29bf SHA-256: ee0f4b7ea7cb18bb67efbfe254a871277bf080a9c6c2b9b3cc85c15a370f5496
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious sites, potentially for further 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://pelibifir.ru/123?utm_term=canon+rc-6+remote+control+instructions PDF link annotation
    • https://ruzuwigowan.weebly.com/uploads/1/3/1/4/131453288/5301f.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/god_kings_gameplaywyu1h.pdfIn PDF document text
    • https://wugabatove.weebly.com/uploads/1/3/5/3/135318753/8707c1.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxiwugo/thbSifo/paper_toss_boss_hile_apk.pdfIn PDF document text
    • http://fresh-ita.fun/mapa_de_riesgos_la_paz4it0d.pdfIn PDF document text
    • https://cdn.sqhk.co/revujinarewu/Lh1jdE0/redream_android_tv_box.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabumamuv/bjgZgha/pandemic_survival_guide.pdfIn PDF document text
    • https://fufarolobol.weebly.com/uploads/1/3/4/5/134597676/6231541.pdfIn PDF document text
    • https://minunelojob.weebly.com/uploads/1/3/1/4/131453060/xaderabipojodil.pdfIn PDF document text
    • https://cdn.sqhk.co/lojavowi/R2w3eIY/67249462090.pdfIn PDF document text
    • https://cdn.sqhk.co/bidusowo/hhjdKii/neon_wallpaper_4k_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/UjjmzhS/fimexiseduwiki.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/hedhchh/callaway_erc_golf_balls_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/jjfieKi/scene_synonym_thesaurus.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/QyCibEp/97074126102.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/ppm1hg7/digubaxovorasolixir.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/Dlwfijo/57860496531.pdfIn PDF document text
    • http://alex-travel.moscow/weed_wacker_blades_lowes7c4a2.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_off0000df11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF11 5036 bytes
SHA-256: 1616e0e90b2338912225cc9d1b1554aec297bc329757d8ec03d4257d10ce4bf2
font_01_sfnt_off0000f01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 10552 bytes
SHA-256: 322d10c889c013fea43e1f216f74fa540224f5492030efa84ea88519704f3fb9

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