Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b01aaf001cc08f3…

MALICIOUS

PDF

125.0 KB Created: 2021-04-14 06:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3de03ad535c6fba091bd0d82fbbe01ba SHA-1: b0c129fa64526b756cf76dc63c6733cede88645c SHA-256: 8b01aaf001cc08f352ea94ca77e7f696ff763b4eb38d05206bad92048cda05e4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports that this PDF is designed to redirect users to a network of potentially harmful sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=life+after+death+book+pdf+in+hindi PDF link annotation
    • https://cdn.sqhk.co/wimedizi/hfVigeu/50405058865.pdfIn PDF document text
    • http://releterixorof.22web.org/pewubod.pdfIn PDF document text
    • http://evromotors.net/class_11_applied_mathematics_book_2020-21evwo9.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/donuzutagox.pdfIn PDF document text
    • http://momsmall.space/xifokukizadoxomdy2fk.pdfIn PDF document text
    • https://cdn.sqhk.co/kitatoze/qwgfjfN/cricket_24_live_scores.pdfIn PDF document text
    • https://cdn.sqhk.co/razotefo/Vicgege/43062795844.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/jofunozuzof/kado_the_right_answer_opening_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/secret_sheet_music.pdfIn PDF document text
    • http://wazugelep.rf.gd/speaking_in_tongues_bible.pdfIn PDF document text
    • http://jovuxajir.rf.gd/curriculum_vitae_template_word.pdfIn PDF document text
    • http://puriruf.epizy.com/72313132797.pdfIn PDF document text
    • http://rujunigowe.epizy.com/meaning_of_causal_research.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/92276952856.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/tujosujibanib.pdfIn PDF document text
    • http://kurotilojefuvug.epizy.com/55777511271.pdfIn PDF document text
    • http://demezokesude.rf.gd/neboredurafukeniwuku.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/corporate_governance_report_of_any_company.pdfIn PDF document text
    • http://xufolat.atwebpages.com/gakagi.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_off0001aa4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA4E 5064 bytes
SHA-256: af0dbe12794d138c7d625fe66dc7fb2d686a691e478d2958869ee2e995015170
font_01_sfnt_off0001bb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB83 14696 bytes
SHA-256: 8028de774a1a5721b97e6033fa168be434afb47481d9fe748e90bd9baedc6bbb

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