Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ca433524b3b719…

MALICIOUS

PDF

68.8 KB Created: 2020-11-17 16:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dabff394dca22c4677dd3c946809b85 SHA-1: 1cb1df8e9145ebb6da0d11b952110d7a37409120 SHA-256: f9ca433524b3b719662bd694f704babad92fe8eda42268762e57a831e73ce95f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'traffine.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text that could be interpreted as a lure, and the authoring application suggests it was generated programmatically, common in malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?utm_term=one+night+at+call+center+in+gujarati
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5f9932acdb61a.pdf
    • https://cdn-cms.f-static.net/uploads/4407316/normal_5fa29f7301f08.pdf
    • https://cdn-cms.f-static.net/uploads/4394068/normal_5f906ed73cb48.pdf
    • https://cdn-cms.f-static.net/uploads/4415544/normal_5fa59f3d47b32.pdf
    • https://cdn-cms.f-static.net/uploads/4387046/normal_5f934b14de3f6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wibadinavosunom/51240617403.pdf
    • https://s3.amazonaws.com/sugowubuf/ap_bio_chapter_19_viruses_reading_guide_answers.pdf
    • https://s3.amazonaws.com/xabalaru/mos_study_guide_practice_files.pdf
    • https://s3.amazonaws.com/tuzamada/14353074858.pdf
    • https://s3.amazonaws.com/wudibirewuduto/93872289972.pdf
    • https://s3.amazonaws.com/vopadofugon/rageselugipepisazirub.pdf
    • https://s3.amazonaws.com/varolexexus/sireg.pdf
    • https://uploads.strikinglycdn.com/files/c010e432-ba40-4509-85a1-a5e701acc866/11879057600.pdf
    • https://s3.amazonaws.com/gofilafixu/famous_pop_songs_piano_sheet.pdf
    • https://uploads.strikinglycdn.com/files/b1116d48-92ed-456e-a976-ebf0c9708607/jonawimenod.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_off0000d280.bin
a630441346cd4ccdbb85a02543ae397ce0adb714ec795456eafdd081cc5287f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD280 4984 bytes
font_01_sfnt_off0000e372.bin
c317d031d703ea0c0d71c713a7c83c085f2547785c88e4971bcf7cab0c7007f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE372 10264 bytes

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