Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b93a14cf32b08c…

MALICIOUS

PDF

104.9 KB Created: 2021-03-17 09:11:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 81e8e390d4cf5c8451d1a014b5e3cd34 SHA-1: 6b070a1f57c1000809f61cceb544221beee29569 SHA-256: e5b93a14cf32b08c1a8e7b431335df8ebdbbdea97337d54f3be55e7e15f1c6cd
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 ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the PDF structure indicate an attempt to redirect users to potentially harmful content, likely for SEO manipulation or to host further malicious payloads.

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://soxebez.ru/award?keyword=what+are+the+agents+of+socialisation+pdf PDF link annotation
    • https://cdn.sqhk.co/vutazekerubu/gjghjcS/firijiwom.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/ijjheig/galaxy_shooter_falcon_squad_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404959/normal_5ffb74c787ce2.pdfIn PDF document text
    • http://reawont.online/redsun_rts_premium_apk_freeamwjx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375908/normal_602e695ebbac9.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/98jg04y/modixigesidurudozuko.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/hMZ3haY/dajusavogafisafinekuko.pdfIn PDF document text
    • https://razamilijukiw.weebly.com/uploads/1/3/4/8/134879964/acc9dc7c179fc38.pdfIn PDF document text
    • https://fezuwujazu.weebly.com/uploads/1/3/5/3/135347069/tamelekitagir-pitafabusur-xolig.pdfIn PDF document text
    • http://m-ryanaf.site/782152866439gfng.pdfIn PDF document text
    • http://autolombardpro.ru/riwadu9ojnu.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/iKDhbih/jabodowesuselesebu.pdfIn PDF document text
    • https://cdn.sqhk.co/waladoved/hjZ3RX5/20316569387.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/NmvgjSy/dasofosudoki.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/hbRrib2/story_mode_gta_5_cheat_codes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd0d12f-7295-41e7-9d8e-e995ec69584c/17477519795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daef4934-0b53-4e60-b235-15b1abda0525/tekulubufetoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86719565-b28a-4e85-b0f0-371dc49abb4c/red_letter_bible_free_download.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E8D 5432 bytes
SHA-256: c32545c46db94ca7809688d2fdf249901bf0244c8ef602e4bc6079d063dee8ca
font_01_sfnt_off00017111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17111 11108 bytes
SHA-256: 9c251a3971efb9b2b8943bec4722dee23ed86220713750e3b934922bc8fbb6e8

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