Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3ae31598f85a68…

MALICIOUS

PDF

78.6 KB Created: 2021-03-17 02:23:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 895805cfd6bad6c47beed0adadf40cc6 SHA-1: 51c31116ae8098c4f8d03ae317f2a2b36a6fd4db SHA-256: 1f3ae31598f85a686c91f9ed99886f8e61d458b7a1775a3161c0c81a94b2472b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=hp+42s+battery
    • https://cdn-cms.f-static.net/uploads/4445745/normal_60434369d8608.pdf
    • https://static.s123-cdn-static.com/uploads/4445892/normal_5fddd0c90151b.pdf
    • http://wufamega.scienceontheweb.net/vibaluxejumukuri.pdf
    • https://cdn.sqhk.co/totimujid/pgcifNv/best_free_project_management_software_for_small_business.pdf
    • http://fujubipe.22web.org/72548656415.pdf
    • https://cdn.sqhk.co/joziroluxu/hesuji5/tachypnea_medical_definition.pdf
    • http://winujujoje.22web.org/xamuvugaritezos.pdf
    • https://cdn-cms.f-static.net/uploads/4489853/normal_5fd3412847a83.pdf
    • http://durebemidiges.getenjoyment.net/gikilateweteropeforiko.pdf
    • https://static.s123-cdn-static.com/uploads/4476593/normal_5ff7c954f258d.pdf
    • https://static.s123-cdn-static.com/uploads/4387566/normal_60085f098361c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wumodukubaru/halo_3_games.pdf
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_5d57512d03fc40b5bebae369f5369000.pdf?index=true
    • https://s3.amazonaws.com/bulalowisu/bootstrap_mobile_admin_template_free.pdf
    • http://fufibilola.epizy.com/36978291950.pdf
    • https://025b4bf0-2906-4f5f-8a0f-6d4b68fc9518.filesusr.com/ugd/148ee2_f9afb24a416e4c2088b2ce5cdbd4b6d6.pdf?index=true
    • https://s3.amazonaws.com/wewuxuviwar/31946028564.pdf
    • http://vupikefugogulup.epizy.com/star_wars_thrawn_book_series_order.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_off0000e8ba.bin
0a4ed558037115c5b066be7095f0b9b30cbef9556a82c51883f141f5cbbff25c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BA 4728 bytes
font_01_sfnt_off0000f8d9.bin
511e9e2b68988107840bf0e2f4b8c285c48903241796365f38187c793288de88
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 11356 bytes
font_02_sfnt_off00011f9e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9E 4324 bytes