Malicious PDF — malware analysis report

Static analysis result for SHA-256 6594cb4b7ee46af6…

MALICIOUS

PDF

64.1 KB Created: 2020-12-24 00:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e90f337315796e1a6218a0ebc27e8a0c SHA-1: 5d8f21849b20ac498486698ba8e06219210df822 SHA-256: 6594cb4b7ee46af6a5ddb2698f8f1d8f0c141fef744c65815148aeb47671910e
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'traffking.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, contains references to 'Yandex disk linux webdav', suggesting a lure to trick users into downloading or interacting with the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/strik?utm_term=yandex+disk+linux+webdav
    • https://cdn.sqhk.co/naritiba/Dqhjggt/easy_worship_songs_chords.pdf
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5f9f8b5c10696.pdf
    • https://cdn.sqhk.co/pegebatanuz/RZaZ0Qt/acero_inoxidable_material_compuesto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lonozote/types_of_weather_worksheet.pdf
    • https://s3.amazonaws.com/ravuxudibure/81120739941.pdf
    • https://s3.amazonaws.com/dudigonifu/circulatory_system_worksheet_fill_in_the_blank.pdf
    • https://s3.amazonaws.com/fixararololu/47429388636.pdf
    • https://s3.amazonaws.com/bidivo/ridakulop.pdf
    • https://s3.amazonaws.com/wufujudisu/kegigulagesefiwi.pdf
    • https://s3.amazonaws.com/xukonakefules/important_quotes_from_the_book_life_of_pi.pdf
    • https://s3.amazonaws.com/bupijila/17681563652.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_off0000bfe6.bin
0ffe34a2005bf7a903b2820bd6940ff57d11a4f6c3095de6b3fe2cca3285824a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE6 5108 bytes
font_01_sfnt_off0000d177.bin
a2410424641887294608d3377c6f4ce0495b133cded4822937d759dfe400aaca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD177 10056 bytes

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