Malicious PDF — malware analysis report

Static analysis result for SHA-256 7382f8b8cbf9c150…

MALICIOUS

PDF

69.5 KB Created: 2020-12-13 21:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 752c57d9513a2b701870ec923712e948 SHA-1: 965ff8010ef0c20a08cc5a7edc94fb8b4cae3872 SHA-256: 7382f8b8cbf9c1505088773885aee150bdf272cc6c643d1c89c606b5d04ed626
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to truck specifications, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=ram+1500+mpg+diesel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5f8a95c02d562.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/xavoxosumexo.pdfIn PDF document text
    • https://zagusopiv.weebly.com/uploads/1/3/4/2/134234894/83b951f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5fc0c2dcc7ddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455886/normal_5fab7d463f796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415304/normal_5fb2e3ac21139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403806/normal_5f96514b7883c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_5fc30540416b7.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/jotizifime/cognitive_ability_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/noref.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/19675410231.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/26378895065.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_off0000d302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD302 5508 bytes
SHA-256: ca5ee0c1e793b303e107b2a0d390a8afe5b50c9ab4d4ec4e398b2e5865a30993
font_01_sfnt_off0000e5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B2 10612 bytes
SHA-256: b4cf58344e8592b7806dd7ec06761448a3f1208ed57d5f28e694c36b3ba5b68a