Malicious PDF — malware analysis report

Static analysis result for SHA-256 73bcd73d6aa855b4…

MALICIOUS

PDF

70.0 KB Created: 2020-11-16 19:11:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b256d121e57a5a7a05fc4d130920293a SHA-1: 14d09316331fb71b0146219c097345573d740fbc SHA-256: 73bcd73d6aa855b4511c65011363e9c0512463bb9762e948ff541d38f6c5f7f4
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffine.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

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://traffine.ru/123?utm_term=mushroom+life+cycle+explained
    • https://xitonodulamet.weebly.com/uploads/1/3/4/3/134307836/189438.pdf
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5f92448a09053.pdf
    • https://cdn-cms.f-static.net/uploads/4423772/normal_5f9e33c9de33d.pdf
    • https://cdn-cms.f-static.net/uploads/4374956/normal_5fa7d919c454f.pdf
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5fa332e0260c6.pdf
    • https://cdn-cms.f-static.net/uploads/4480412/normal_5faabf3f68814.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/memul/delodosidufavogepirijar.pdf
    • https://s3.amazonaws.com/vudivuzakal/movie_series_online_io_123movies.pdf
    • https://s3.amazonaws.com/moxekibupuru/doubles_minus_one_worksheet.pdf
    • https://s3.amazonaws.com/ribowexulo/laxaruvajagonolujes.pdf
    • https://s3.amazonaws.com/vazisi/new_fairfield_schools_org.pdf
    • https://s3.amazonaws.com/vuraradaso/tepiriraxebatununapuv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d534.bin
de9c7bd7deb15d57cfcda8e06e4d9d1cd796b0f877db1496b85e7863ab4f465c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD534 5572 bytes
font_01_sfnt_off0000e812.bin
d4536b597750e7402d827fb2e509bf2ba96ddbf7caa174379112d2e389594749		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE812 10340 bytes

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