Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e4cbe735b94a13…

MALICIOUS

PDF

68.2 KB Created: 2020-12-22 15:22:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 58ee44423163a126f4abe86a63b739d0 SHA-1: 1d576ba87ea79ea793a121d2e73db7d6555f4d1e SHA-256: b8e4cbe735b94a13746f5409259198564beb61203fc2e637dcebfac013e9e3da
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'trafficel.ru', which is suspicious. Although the document body is heavily obfuscated, the presence of an external URI and the overall detection suggest it's designed to lead users to a malicious site, likely for phishing or to download further malware.

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://trafficel.ru/aws?utm_term=boston+red+sox+coloring+sheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420747/normal_5fa9c695674ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_5f9098956de6e.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/panalipolifod/50490960941.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/zaxenojukovolamezeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8534b7b-a651-4d3d-8621-62f7e8b47495/80773000662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6f8ac7-1632-4c71-b536-d92046750c8b/78994363469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2fd98fc-64a5-48a6-accf-d7dbf9b6de8d/365_names_of_god.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/free_printable_comprehension_worksheets_for_grade_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcecc0e4f0831169e741321/t/5fd6545c0f11661d4c299856/1607881821566/annual_report_thai_airways.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/48298888036.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/ajt200_data_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48e99bd1-d392-4351-b57a-26717e1e6ff8/pexezigitewiwin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7806a9fa-e18e-4130-81aa-e8b9d76df7df/wemagid.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_off0000ce43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE43 5108 bytes
SHA-256: 0f574b9c3f0ebea132b08d87fcc73407947b09c393722720e2de9a13c8ef6e67
font_01_sfnt_off0000dfa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA3 10600 bytes
SHA-256: 8dc20932525c4b7c1227346e1bd66273ebcacf86bf0e542fc66aeba53468b072