Malicious PDF — malware analysis report

Static analysis result for SHA-256 4613d1ff580e6d31…

MALICIOUS

PDF

81.8 KB Created: 2020-11-25 08:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1d549805aee008fb355f3b05f99d7972 SHA-1: 2031312afa4588a24ae5abb067a4a3473a53e17e SHA-256: 4613d1ff580e6d31a81552897708466f97512e4fe81e633679dc7441b6f817fa
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffnew.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body and embedded artifacts do not provide further actionable information, but the overall structure and the presence of the external URL strongly suggest a phishing or downloader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=unblocked+games+66+return+man+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f875deb6a16f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401696/normal_5fab78e4e43d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5fa319482812f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481515/normal_5fbc03818718b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477877/normal_5fbd8f5683194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409623/normal_5fbd7a66d02f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470408/normal_5fbdd265675ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412780/normal_5fa48bd51585f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5f98c306dcfe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5fba9427b5ae7.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/dudujopixejikug/briskin_sheet_mask_review.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/sowabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/478b7dc9-9aa9-4fe1-9e94-06cd97c2be69/windows_xp_professional_x64_edition_service_pack_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6b8f039-eeb9-44ab-a9e3-19fdece80552/rusenujorotezaguxafuriz.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_off00010028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10028 5740 bytes
SHA-256: 8a745fbdb9b5808b5521d88fd90c92699fd375c7a83f7cf869c715c5e5f7e817
font_01_sfnt_off00011397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11397 11308 bytes
SHA-256: b06d149bd048d98cc9148c4f0c5211d0d7214db400fa420461a81dcc7bee849c

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