Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94be7dd70b71740…

MALICIOUS

PDF

74.0 KB Created: 2020-12-10 19:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4a1962303dd8610cdfb6775531e813ac SHA-1: 18119c34c3834ee1f70e0a53f75c500313b730bb SHA-256: c94be7dd70b71740c61f4a4ba3c1fc00c84d06982ef2fe988c3a48fc0dbcacae
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to 'https://trafftec.ru/strik?utm_term=duel+masters+price+guide', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'Duel Masters price guide'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/strik?utm_term=duel+masters+price+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393035/normal_5fc8a158a804d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482880/normal_5fc3d9ed67e80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449599/normal_5fcf9e98a8c75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454556/normal_5fcb53c6b9ed3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489724/normal_5fb5a3a0804ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421342/normal_5f98da0797d77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5fab623423674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_5f94c74d9deb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450864/normal_5fb89dc27c878.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386091/normal_5fc7b58e6e9f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369191/normal_5fc7d62e72b03.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf523e61e25426e12f5277/1606373950438/bironuginawobosatisege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be6b32d-76bd-4dec-bc48-f70fc06d1b14/13018634412.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B8 3544 bytes
SHA-256: 43715b516ab9e63ceba00b8cfcfac654b94556daed58800092d4525cf5d2f733
font_01_sfnt_off0000e368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE368 5392 bytes
SHA-256: 79a9633aa57e475a4a6d7d12a550e1e8286c220b1e6ca3556c7370ec51d2d46c
font_02_sfnt_off0000f5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A7 10384 bytes
SHA-256: f44b7b843cb81c2708083a91e3771ad5b18d22da230c2c93133840808dc19f6f

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