Malicious PDF — malware analysis report

Static analysis result for SHA-256 a539dd94fbdb6dc5…

MALICIOUS

PDF

81.1 KB Created: 2020-12-05 11:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 525a9139182b11b576f6feed9a69f6ac SHA-1: b3abf922816cf565c4fff89b56c72558b2e50f32 SHA-256: a539dd94fbdb6dc5d8a9bb68d1d1a8c084245ec16e26bd8c810a5896b1f7a3b8
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 'trafftec.ru', which is likely a phishing or malware distribution site. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not a typical user-facing document but rather a container for malicious content.

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://trafftec.ru/strik?utm_term=james+james+morrison PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403952/normal_5f952c0be2396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_5fbd0adb1b711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_5fbe18abeda6b.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/5fc57a1f5bcb0228a2a171e7/t/5fc8054ee69b871994e18a6c/1606944078522/75073692883.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc396e768612547ed6ed8ff/t/5fc5ea78cb3e0f57711c2b80/1606806139906/periodic_practice_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1273e403f5353fd9754a9/t/5fc485f7eaf37e3b642d26b9/1606714871698/72933554977.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1210ec89e1c4b8fbfc3b6/t/5fc357d1f3de5e49b5ced1e3/1606637521968/spyder_victor_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/what_is_a_homologous_series_chemguide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc597f260f2895dc107beb3/t/5fc9916f3ff94c207e01ef8f/1607045488960/shareit_app_download_for_android_apk_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/montauk_long_island_fishing_report.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0ac468bfc5186169baac/1606224592158/94736115300.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_off0001028b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028B 4864 bytes
SHA-256: 0932541c900f93a80f386f482dbadf2872355fe604e280dca645d1db74316c8a
font_01_sfnt_off000112fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FC 10824 bytes
SHA-256: d4d9203322be8bdc5ed8a534ec15464cbfdd0a52a9c1563c19cde7209ebb7839

Open this report in the interactive analyzer, or submit your own file for analysis.