Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e9b7929efd401d…

MALICIOUS

PDF

89.1 KB Created: 2021-03-09 11:31:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 28d0b3385fb2a266b9464e251f68ee17 SHA-1: a83c9b94d755cce8b6e32f61d3f6fd8e0da53ae5 SHA-256: 60e9b7929efd401d99002abf9e9fd84a0289497bb65b01ac641ea43a1181d30e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a prominent one pointing to 'jumiwimov.ru'. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The ML classifier also flagged it as malicious. While no scripts were explicitly extracted, the presence of external links and the phishing heuristic strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=johnny+ace+wwe+voice+before PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370767/normal_601b1ee5b858a.pdfIn PDF document text
    • http://copyrightnotices-form.com/tugirapr8w9u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485821/normal_5fd336413d353.pdfIn PDF document text
    • http://obschee.xyz/sims_freeplay_unlimited_lifestyle_poq390z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408321/normal_60143bee29686.pdfIn PDF document text
    • http://pshcomonhere.xyz/microsoft_visual_basic_for_applications_excel_2007qgg8q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477913/normal_601f1ccf27d1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446394/normal_5fec6b25e4b47.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/wowek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d42f6631-a4bc-4094-9256-0afb357f2b05/black_ted_dekker_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5a865a-1904-4e95-8e4e-13e9c916a1e5/remington_model_700_sps_tactical_bolt-action_rifle_.308_winchester.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fdc16ea-a0dc-42fc-a123-6a1510fa011c/32104399872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17dcf32e-ee9b-47b0-b513-a9aa6bcaed5f/georgia_driver_license_manual_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc165964-be45-44f6-b5df-eaeac9a0ac9e/lord_of_the_rings_book_2_chapter_9_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a20d983c-2914-479e-8e03-9aed8426164f/likekilozimeka.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/59238124487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd478ba5-f432-4040-828f-1ef34fb98b6d/69455645406.pdfIn PDF document text
    • http://zimopup.myartsonline.com/does_chocolate_milk_cause_weight_gain.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_off0001222d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222D 5140 bytes
SHA-256: f92ede23473908e752262f25e73b8d58b7ac25a1e848426c4658b920d1ee8b21
font_01_sfnt_off000133cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CB 10364 bytes
SHA-256: b371dde4a012ec98dcb6c4389d4e639702e702ee4b765d72d84a8afc2d73cd37

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