Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d5c7fa661a8ad0…

MALICIOUS

PDF

68.3 KB Created: 2021-02-21 10:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 006703705c67bdbade64c22b9aebd32b SHA-1: 9e29db30ac18f54bcaa5d5118f63b8d22e7e66fd SHA-256: 04d5c7fa661a8ad05fc1aad596853a66e34a7c5303da96ef15d5c58a9ef1b98d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While 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 or malware distribution 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://jacksth.ru/wix?keyword=vice+city+android+apkpure PDF link annotation
    • https://cdn.sqhk.co/tamaladafa/dWghWhd/negusenonetijiri.pdfIn PDF document text
    • http://swiss-gear.shop/are_tires_cheaper_on_black_fridayzw913.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/fY9ie4W/dead_effect_1_apk_obb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491927/normal_600bd36549a24.pdfIn PDF document text
    • http://aduo5.online/868246846348klqy.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/5hjidhe/ice_climbers_desync_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393028/normal_60240351d1781.pdfIn PDF document text
    • http://3gusevshop.website/line_rider_musicphfqo.pdfIn PDF document text
    • http://ampinternational.org/divozarokevecr8e2.pdfIn PDF document text
    • http://natorg.fun/dofetitesigoruxukuk5e45.pdfIn PDF document text
    • https://cdn.sqhk.co/netimupoxojo/agjQDig/leadership_styles_in_business_management.pdfIn PDF document text
    • http://ighelpcenter.xyz/tuwufofoporb3ywe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_602ef364946e9.pdfIn PDF document text
    • http://vnds-super.space/ruvibavisujufugixdjena.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/TAaggih/rescue_game_save_princess_2.pdfIn PDF document text
    • http://salleapp.xyz/xebegetarepogulep23ka6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC31 4988 bytes
SHA-256: 4579d32acc1acccb7562d0449f7d718bd2f7dfcdad3d66e9355ab39ec7b8f51a
font_01_sfnt_off0000dd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 12624 bytes
SHA-256: 3a3aba551c2b3e03d1231081c79b042136e36d96be20cec2bab63bc44974b514

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