Malicious PDF — malware analysis report

Static analysis result for SHA-256 098ea3b6c14b605c…

MALICIOUS

PDF

67.1 KB Created: 2020-12-08 02:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b790f253f040fab5b246396e803428d0 SHA-1: 1b54ae842b76ea36123790a0572bcdb478c48dca SHA-256: 098ea3b6c14b605c898461921494713af0820afe2b35bf7d5758b0864b9c4a7c
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://trafftec.ru/strik?utm_term=adobe+creative+cloud+keeps+popping+up', which is likely a phishing lure related to common software issues. The document body, though heavily obfuscated, contains references to 'Adobe creative cloud' and 'wkhtmltopdf', suggesting a pretext for directing the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/strik?utm_term=adobe+creative+cloud+keeps+popping+up
    • https://cdn-cms.f-static.net/uploads/4468827/normal_5fbcf898a9b69.pdf
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5fc98f2dddb83.pdf
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5fa9cdf32c6a8.pdf
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f948bee746b5.pdf
    • https://cdn-cms.f-static.net/uploads/4461763/normal_5fa4e9d90d1c2.pdf
    • https://cdn-cms.f-static.net/uploads/4407788/normal_5fb461cc0f243.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/guwutivupudutu/free_customer_service_resume_templates_for_word.pdf
    • https://uploads.strikinglycdn.com/files/32a7431b-46a8-41da-90ff-dd9120326087/minecraft_daylight_sensor.pdf
    • https://uploads.strikinglycdn.com/files/0b3ee67a-a9ff-4ae7-b43b-6e3110147916/fast_and_furious_1_full_movie_download_in_hindi_480p_bolly4u.pdf
    • https://s3.amazonaws.com/zuses/zumikozojubobikositom.pdf
    • https://s3.amazonaws.com/sazixipame/21455820689.pdf
    • https://s3.amazonaws.com/xajowu/cite_mla_format_from_website_url.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_off0000c794.bin
86f12e8465aef44fb055ae61af82dc8fb517a8aba61c0e80e4802b114c9cd4c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC794 5492 bytes
font_01_sfnt_off0000da51.bin
b2bed1cd241342be506e848a1079a14daca9c837ac24582f114fbe4c6ae32157		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA51 11016 bytes

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