Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0d633ad3809f0e…

MALICIOUS

PDF

69.0 KB Created: 2020-12-23 22:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b292d079153d9e46b998c9f6d2e357c0 SHA-1: d6a3998403833a4e9c6de5a4b652e6ca7c048c51 SHA-256: 7d0d633ad3809f0e456c9be2d646ef55869e47f8b41550516ef3f0dd74152f94
96 Risk Score

Malware Insights

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

The file is a PDF document that has been flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, as malicious. It contains an embedded URL pointing to 'trafftec.ru', which is likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'Cross stitch united kingdom'. No scripts were extracted, but the presence of embedded URLs and the overall malicious classification strongly indicate a phishing or malicious content delivery attempt.

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://trafftec.ru/strik?utm_term=cross+stitch+united+kingdom
    • https://cdn.sqhk.co/dozirolizilu/8iel6ij/tilupuxa.pdf
    • https://cdn-cms.f-static.net/uploads/4466366/normal_5fb3e13143af4.pdf
    • https://cdn-cms.f-static.net/uploads/4413369/normal_5fa21fdb0eefb.pdf
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f87783fc4875.pdf
    • https://cdn-cms.f-static.net/uploads/4412583/normal_5fad5e1498022.pdf
    • https://cdn-cms.f-static.net/uploads/4382974/normal_5fb30b88d79e8.pdf
    • https://cdn.sqhk.co/vekasurox/V1zlhby/hydraulic_calculations_for_fire_sprinkler_systems.pdf
    • https://cdn-cms.f-static.net/uploads/4475989/normal_5fdc1ada3b09a.pdf
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fc81443ad0ed.pdf
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5f884e5e1684a.pdf
    • https://static.s123-cdn-static.com/uploads/4369908/normal_5fcc47c4c4666.pdf
    • https://cdn-cms.f-static.net/uploads/4450434/normal_5fc0cdd52a2c6.pdf
    • https://cdn-cms.f-static.net/uploads/4393638/normal_5faaee28ca6e9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/felasorarabipis/komplikasi_asidosis_metabolik.pdf
    • https://uploads.strikinglycdn.com/files/a14f841c-c082-4ffd-997a-12c6fb340e7c/17351500035.pdf
    • https://uploads.strikinglycdn.com/files/88f68cb4-0a59-408b-80fe-02074444b748/terurilelo.pdf
    • https://s3.amazonaws.com/bupaxomu/dozutunad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d162.bin
a4d9bac3c8d6af814d509b1243b45c0607df78e7342e5d1cb48b5f4cc385f41a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD162 5080 bytes
font_01_sfnt_off0000e27b.bin
1c2e7434032eb00de4b93cd4db988fccc488744cb9403a3d5fc1c8064ee5159f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE27B 10640 bytes