Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ca200358558a61…

MALICIOUS

PDF

93.4 KB Created: 2021-06-06 11:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b7d78388cbb592965367394162776b4f SHA-1: f7b41fdb12764bfe4fe5943b37b3185cb68b36d3 SHA-256: e9ca200358558a610598e3c36f400e65621694bf3e6d0930884978ed6c741722
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external links, many pointing to disposable hosting, and the ML classifier output was very high. The embedded content, though heavily obfuscated, suggests a lure related to 'fantasy books' to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://garglob.ru/pbw?utm_term=good+books+for+12+year+olds+fantasy PDF link annotation
    • https://wininivawad.weebly.com/uploads/1/3/1/4/131483201/lifexanes_sonajewived_sipemipam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378607/normal_6000d6bebed2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418556/normal_5fff5c88e8f6a.pdfIn PDF document text
    • https://pewoguliburutoj.weebly.com/uploads/1/3/4/2/134234653/pagulakudipaduwiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427105/normal_600b5f4dc2cd0.pdfIn PDF document text
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/kefemiregideriramot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_60611d617080e.pdfIn PDF document text
    • https://dapunilak.weebly.com/uploads/1/3/4/5/134506399/fe354190.pdfIn PDF document text
    • https://bapiribudiwapik.weebly.com/uploads/1/3/4/8/134885568/rofepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426679/normal_603eebb7efaf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496402/normal_604a9e195dc4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zafasuvolo.pbworks.com/w/file/fetch/144538074/how_do_i_log_into_fox_nation.pdfIn PDF document text
    • http://gonumutat.pbworks.com/f/kemerupe.pdfIn PDF document text
    • http://zigunef.pbworks.com/f/tegufowisaxunafafu.pdfIn PDF document text
    • http://nefusim.pbworks.com/w/file/fetch/144438807/44399652582.pdfIn PDF document text
    • http://paderukut.pbworks.com/w/file/fetch/144466947/el_libro_de_enoc_google_drive.pdfIn PDF document text
    • http://zilebunod.pbworks.com/f/dnd_5e_hexblade_paladin_guide.pdfIn PDF document text
    • http://mevuteled.pbworks.com/w/file/fetch/144544647/bayes_theorem_probability_questions_and_answers.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144413874/tidun.pdfIn PDF document text
    • http://magobok.pbworks.com/f/jinerenakevukujakoza.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_off00012eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEA 5420 bytes
SHA-256: 88297f60f736239960a44d49021bf0ee80ddc06f1b6b8f76a76b3ca843b56d7b
font_01_sfnt_off00014177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14177 11128 bytes
SHA-256: 38ccf2ab356c68d6d82c73ac9744d8cdb4732b90e3f87425ef395b28becce395

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