Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89d51f9df82affa…

MALICIOUS

PDF

70.4 KB Created: 2021-01-06 14:26:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 846cfe26bbba1daf2ed9a35a37c844bd SHA-1: d79e8d83d2d8fded956e482803aae596b8c1afc5 SHA-256: a89d51f9df82affad1d0315e562dd017bdf9da03b5af64cabe4e99e6e60e7729
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 that directs users to a suspicious domain, likely intended for credential harvesting or malware delivery. The document body, though heavily obfuscated, appears to be an advertisement for wholesale denim jackets, suggesting a social engineering lure.

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://traffnew.ru/123?utm_term=wholesale+denim+jackets+mens PDF link annotation
    • https://cdn.sqhk.co/rejibebadit/jfighj5/bosafitelebonavepitu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393785/normal_5f91b8628e21e.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/yiavgiY/gijizofotevufazasefopupa.pdfIn PDF document text
    • https://cdn.sqhk.co/mesodimeduje/hbYMthf/textnow_free_texting_calling_app.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/eIjiic4/69508794346.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/gG1haje/xufekijurijowusesitila.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/saxitezivadejegijalimafo.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/84447985627.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/19019552318.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/ethiopian_reporter_archive.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/employment_insurance_reporting_income.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/doubling_numbers_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/49608800782.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A0 5236 bytes
SHA-256: 7e7fcc3919e84c194edd2f0113899c447cffb06ff44811c3203f52e53ac5b82c
font_01_sfnt_off0000e85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85A 10840 bytes
SHA-256: c403878a310cc7c8483eeab3d7a18ff9aa067dbb082b895b4a18166448ecbe25

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