Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e065d89d0dca1f2…

MALICIOUS

PDF

87.8 KB Created: 2021-02-22 20:09:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9698157bb9a660ddee3ec8ae9164bfa8 SHA-1: 9fa51788ada14e8553987571af2a9cd29ac1c72e SHA-256: 8e065d89d0dca1f2b733d3f51a8a22fff67e9e14bc89aa584091329308bbd435
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a deceptive pretext to encourage interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=argument+from+reason+debunked PDF link annotation
    • https://cdn.sqhk.co/zixemoliz/b4jh4I4/rogue_buddies_2_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_601b3603edb49.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/jhkoP86/70039782456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_601260879a3d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_60299a84f10ef.pdfIn PDF document text
    • https://terenedadobi.weebly.com/uploads/1/3/5/9/135961601/6301827.pdfIn PDF document text
    • http://idealica-tufficiale.website/what_are_the_effects_of_diffusion_on_a_regions_cultural_landscapeqtut4.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/voxulija/cdc_vaccine_information_sheet_shingrix.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/skin_minecraft_pe_villager.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/79411900854.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_off000118ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EA 5388 bytes
SHA-256: 0adf00ddb4615ec5a50815fb81b1d04d6b9ccff9b59ae724ff77f3cb676be71b
font_01_sfnt_off00012b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2D 11372 bytes
SHA-256: 5e27ba7b435d9f63863c4844ff8a2a88371a535a522052b85ea4593311b0e44e

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