Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a3ab69cdb3b2fb8…

MALICIOUS

PDF

83.7 KB Created: 2021-02-20 18:26:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 51d5c236f12433eb21e717363e57ec9f SHA-1: 76ba6497bf8e35796ba33ba72787054bf5040c3e SHA-256: 9a3ab69cdb3b2fb8b699ce0bf064b95e7c1300087b199429dfd8fee0a4fe330d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to book analysis, likely intended to trick users into visiting malicious sites for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=fanon+the+wretched+of+the+earth+analysis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488346/normal_60143ae848c1d.pdfIn PDF document text
    • https://kokopepexepu.weebly.com/uploads/1/3/1/3/131379351/8705262.pdfIn PDF document text
    • http://paypallsecurity.com/dapple_dachshunds_for_sale_in_missouwtlx4.pdfIn PDF document text
    • https://sudivepa.weebly.com/uploads/1/3/5/3/135315425/busapujukevu.pdfIn PDF document text
    • http://magnitoli-2ekran.site/jasexukuruminotumobr8il7.pdfIn PDF document text
    • http://vk-settings-change.online/unlock_reading_and_writing_skills_3_unit_4z6o6d.pdfIn PDF document text
    • https://torudedo.weebly.com/uploads/1/3/4/3/134352944/raluburovuxi.pdfIn PDF document text
    • https://kogevinipuban.weebly.com/uploads/1/3/4/5/134514077/mifunafalosi.pdfIn PDF document text
    • https://vetinuvejozijuk.weebly.com/uploads/1/3/4/7/134745319/e403b2b0e5de505.pdfIn PDF document text
    • https://zutafagufagupak.weebly.com/uploads/1/3/4/2/134235067/towatatok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393641/normal_6007237b864d9.pdfIn PDF document text
    • http://afracheat9.xyz/fadibililixuxedaxefojititgyv88.pdfIn PDF document text
    • https://diwuxofemuji.weebly.com/uploads/1/3/1/4/131407179/pufofa-safunukekefufun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_5fdb3c04d5649.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392668/normal_5fe5ec82cb568.pdfIn PDF document text
    • https://fopezifu.weebly.com/uploads/1/3/4/7/134717551/6141736.pdfIn PDF document text
    • https://jedawakebikota.weebly.com/uploads/1/3/4/7/134715316/bitafida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ragejufa/67937253225.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/20275924609.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/37212626303.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/hospital_pharmacy_design_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/kiladuzofuvikijo.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_off00010902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10902 5260 bytes
SHA-256: 1a5e3f4a7f1b5520f6bd70549c46a2ee2d7a0728f73250dace2d120fbf2213b5
font_01_sfnt_off00011afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFA 12144 bytes
SHA-256: b8711ebb1aadb9d0470cad2ed2c3120633662154940bd2cecb707a237db0a37b