Malicious PDF — malware analysis report

Static analysis result for SHA-256 0609eb667f6812c4…

MALICIOUS

PDF

85.8 KB Created: 2021-03-15 12:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc9dc8c78f148dd770e2514104769648 SHA-1: bbc55351a42caea904a8b9ac5d55d75611142028 SHA-256: 0609eb667f6812c416b81b3173a7ed77e40dbfe3e3a1ca5e44076f492cfe57fc
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 flagged as link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/wix?keyword=realidades+2+capitulo+1a+guided+practice+answers
    • http://fevevafo.medianewsonline.com/how_to_clean_burnt_spots_on_glass_top_stove.pdf
    • http://vugekowuzujed.scienceontheweb.net/80221985479.pdf
    • http://fekevopimibun.sportsontheweb.net/foreign_letter_of_credit_meaning.pdf
    • http://sayseedokg.com/rofuvikowizowofi91f6x.pdf
    • https://static.s123-cdn-static.com/uploads/4401989/normal_5ffb0a0317659.pdf
    • http://lomigakorak.getenjoyment.net/blood_bowl_death_zone_2.pdf
    • http://excschool.ru/jalupuvevijerukusapenevegfhpwk.pdf
    • https://cdn-cms.f-static.net/uploads/4452152/normal_6037e3ab36a7b.pdf
    • https://cdn-cms.f-static.net/uploads/4488339/normal_601ce6e8d8796.pdf
    • https://cdn-cms.f-static.net/uploads/4416798/normal_602978225b3b6.pdf
    • http://findfreegirl.com/fajanuxedozebodifuduzoru9dm3e.pdf
    • https://static.s123-cdn-static.com/uploads/4388173/normal_5fde41513fb74.pdf
    • http://purpless.vip/70691465722ppa6r.pdf
    • https://cdn-cms.f-static.net/uploads/4368497/normal_604d222c2e403.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_22c09f746d134447b2f5825e04ed024b.pdf?index=true
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_737a52e821c340eb89f9ba82495d28bf.pdf?index=true
    • https://s3.amazonaws.com/bulozor/fixing_a_hole_in_sheetrock_wall.pdf
    • https://s3.amazonaws.com/moduxanakuri/free_customer_feedback_survey_template.pdf
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_b496bb46c65942a48ac8f64ad9e8c92a.pdf?index=true
    • https://s3.amazonaws.com/fejakixoweka/goofy_goober_rock_sheet_music.pdf
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_1a5c8de7ed8c4cfdb5a6b6004a723339.pdf?index=true
    • http://nixomirorubu.myartsonline.com/xiwabukarejegurovefi.pdf
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_0cf24defecc74fc8b2ff4100fa94c686.pdf?index=true
    • https://s3.amazonaws.com/rijaliwiguvex/nogoxogiwilajepilejatom.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010273.bin
40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10273 2900 bytes
font_01_sfnt_off00010cb7.bin
c334bfc10e22defafb18148db8785f3d6751dd06c2fc97f225019ba85d3c9c15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB7 5524 bytes
font_02_sfnt_off00011fac.bin
30241d690899414aca7350f21a2915f129b9b6dc385eb6967b27d221c8970a5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAC 12156 bytes

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