Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92691fe7e6ac327…

MALICIOUS

PDF

82.9 KB Created: 2020-12-01 01:52:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d678e53c4dc943d961c524d6ed56a4f3 SHA-1: 2623fa3edc86d84327d2f364975327d3a2b9b70b SHA-256: c92691fe7e6ac3273101889da87a8fd4b21feaf494feb0075e96cf761e5555d7
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. It contains an embedded URI pointing to 'trafffi.ru', which is likely used to deliver a malicious payload or conduct phishing. No scripts were extracted, but the PDF structure and embedded URI strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://trafffi.ru/strik?utm_term=de+donde+es+la+cumbia+colombiana
    • https://cdn-cms.f-static.net/uploads/4392668/normal_5fbad338e82be.pdf
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/4750525.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wanasuvedigo/chronological_bible_online_free.pdf
    • https://uploads.strikinglycdn.com/files/701b3fdf-4a01-4e7a-8ace-8f6316f764ca/splatoon_2_hats.pdf
    • https://s3.amazonaws.com/damevusom/6_reglas_basicas_del_voleibol.pdf
    • https://uploads.strikinglycdn.com/files/9fb9fa78-9347-4cd7-91ef-2b5a12e7e664/99148174587.pdf
    • https://uploads.strikinglycdn.com/files/589bbc60-e724-40ae-bbcb-cbd3796a6654/lifepotepopupejuponixaxum.pdf
    • https://uploads.strikinglycdn.com/files/468b5024-e938-43bb-8452-b4d129dcc53e/vmware_unlocker_mojave.pdf
    • https://uploads.strikinglycdn.com/files/f894f2e7-76e0-4aeb-8897-d05cd585826d/boxing_summer_camp_uk.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_off000106fd.bin
761fbb6905dffa12aa2c213b345a637f8107cb38fe6f38e406f3fb62e21d72d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106FD 5128 bytes
font_01_sfnt_off0001185e.bin
bb7cceb3e4d0392bd8dc09b756bec8f5b8d6e430df07d6f42d98fd7fe530d987		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1185E 11332 bytes

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