Malicious PDF — malware analysis report

Static analysis result for SHA-256 b143c76a30c4fe9d…

MALICIOUS

PDF

63.6 KB Created: 2020-11-11 23:00:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8b0b59c91cbe50fd93c764abdd3757de SHA-1: 9b577a0b17c201b43ca0383042d8c48ed4679faa SHA-256: b143c76a30c4fe9da8229add6c518601e3cadcf14e7e7b9698ec5b35ef02549c
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffe.ru/strik?utm_term=extended+case+method PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427086/normal_5f99d4c4d4304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5f9b54e9c786b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_5fa1a878778c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5f9bba71736ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5f87d91bcd203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5f94b14b89665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_5fa8569e201f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414174/normal_5fa79d6153d50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5fa4ad5449a4d.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/fomaralunex/english_slang_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/vet_tech_proctor_study_guide_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/vrchat_voice_changer_female_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/folovanima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9660ef6-4d3b-443c-8002-74cc5a928689/xazokutopurizavuwipegafar.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_off0000bc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC15 5076 bytes
SHA-256: 98f7e19165c0cfd3e3eeb89d045224676c401550d718aa121e71bcbb41a13cc9
font_01_sfnt_off0000cd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD37 10996 bytes
SHA-256: a68b9c9a9f37027f4194c467e0eb4b8ac9cba2a74482c78f690b7cd5d5542418