Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffaee387def6a1a3…

MALICIOUS

PDF

76.0 KB Created: 2021-03-01 00:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d383d0de1efc1a4e8b1fa84089b9e913 SHA-1: 23ff5a0a64478cef28d1935163b309e4b94ab74d SHA-256: ffaee387def6a1a32a1c5976f7c5fa25942b83c3702d54c8d356534bb4fd302e
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=what+is+the+osha+30+certification PDF link annotation
    • http://zebisol.mypressonline.com/don_look_back_book_cover_coldplay.pdfIn PDF document text
    • https://buwipifigidorip.weebly.com/uploads/1/3/0/8/130813409/vejiwa_rowile_sokafovebud_gijeji.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/17878049853.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/fhghiih/tank._io_hacked_apk.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/prueba_de_comprension_y_analisis_el_burlador_de_sevilla_acto_2.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/76058554413.pdfIn PDF document text
    • https://cdn.sqhk.co/dovinokobez/ibjecJY/kung_fu_heroes_gift_code.pdfIn PDF document text
    • http://detonic-ro.website/braven_stryde_360_user_guideu9i1q.pdfIn PDF document text
    • https://dezekebewefe.weebly.com/uploads/1/3/4/7/134731304/bugivepakaxit.pdfIn PDF document text
    • http://newsportstechnology.ru/how_to_make_shadow_puppets_one_hand1nxx3.pdfIn PDF document text
    • https://vilawamilufulob.weebly.com/uploads/1/3/6/0/136006615/kevixugewode.pdfIn PDF document text
    • http://usesalle.xyz/15566358755kx4yg.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/3798510.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/fOLOfif/instagram_login_history_delete.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/tibitexil/vawove.pdfIn PDF document text
    • http://roveramo.atwebpages.com/divine_mercy_chaplet_in_song_chords.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_off0000ec47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC47 5256 bytes
SHA-256: 88a2cccea430c7527a5ea12bf25ca7e6b6bfe18df28aa7b325256f59de21baea
font_01_sfnt_off0000fe26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE26 10736 bytes
SHA-256: bd60b09b808ef2f4e3dd63f5a89bea269ffd2a45a01485881587b89784275534

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