Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e47c2ced86c433f…

MALICIOUS

PDF

72.3 KB Created: 2021-03-31 19:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e9e56ca95e83deefba19c597aeb67633 SHA-1: 0a77f75b9c87c462449ecd5760b0e35e2da3ccac SHA-256: 6e47c2ced86c433f551b586d987f246e6bef1fd2fda100a37eb190015cca1746
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a phishing or malware distribution lure, likely delivered via spearphishing.

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://leonvi.ru/award?keyword=abbyy+pdf+transformer+3.+0+serial+number+chomikuj PDF link annotation
    • http://vexezujuzas.scienceontheweb.net/what_are_antiscalant_chemicals.pdfIn PDF document text
    • http://qwonder.space/kimirofolaboke8as2r.pdfIn PDF document text
    • http://fomigiv.mypressonline.com/68188433666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_600cbb209b3fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422638/normal_605062864ee52.pdfIn PDF document text
    • http://fsbsiod.com/minecraft_rlcraft_install_guideoa6mv.pdfIn PDF document text
    • http://nnorm-id.com/pusanalewopuxeluwozimodzef5m.pdfIn PDF document text
    • http://mastericy-chistoty.ru/50272239822afld2.pdfIn PDF document text
    • http://sikevemekoma.mypressonline.com/nokatilijojesofu.pdfIn PDF document text
    • http://pobunav.sportsontheweb.net/99463860961.pdfIn PDF document text
    • http://relax35.ru/quality_management_system_iso_9001_exampley4x1k.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/juduk/newspaper_comic_strip_template.pdfIn PDF document text
    • http://luxupuxud.myartsonline.com/complete_electronics_self_teaching_guide_with_projects_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/javascript_date_format_timezone.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/fotutetetesetezo.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/shaded_red_smooth_dachshund.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/enneagram_personality_test_truity.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_off0000db4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4F 6104 bytes
SHA-256: 6520282fd102437664f35be9188e9710ce0a3ad80ab2360fc926b5b744c4107b
font_01_sfnt_off0000eff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF8 10548 bytes
SHA-256: 1e0c3aec38de0cb4faa51cc1be238a190489b5944738fbb2c422ebeddb91a8d7

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