Malicious PDF — malware analysis report

Static analysis result for SHA-256 5426a8dda39b5792…

MALICIOUS

PDF

84.4 KB Created: 2021-01-06 07:55:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5603d59b3232e53bace38903ebed653e SHA-1: 7d354f1e07291fab6afb6a85550ed75f0fdc6253 SHA-256: 5426a8dda39b5792173151e699e27c8ea7f213810dba2b1813d660e743fe048e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?utm_term=browser++complete+event+javascript'. This indicates the document's primary purpose is to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link strongly suggest a phishing or malware delivery attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/aws?utm_term=browser++complete+event+javascript In PDF document text
    • https://cdn.sqhk.co/lokuwanij/ha613PV/tap_adventure_time_travel_cheat_engine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_5fbbf04850fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_5fc1a03465c14.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/jighgja/80786299888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5fda696d11db3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_5fad4dfc839c8.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/winumigutam/pimuj.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/201158470.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/mimujubiwifajebeg.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/augmented_reality_applications.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/49135748247.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/gemubotijilaw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49D 5356 bytes
SHA-256: 71647c875e4a73986ba89d62baa205eb57bd56b8fb3614765457b5c731ab7e22
font_01_sfnt_off000106d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D6 11164 bytes
SHA-256: 33cd262b340f3f7e7b6a7c3d87a5323e47b27da9208e33992892e87a0026989f
font_02_sfnt_off00012d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D21 16756 bytes
SHA-256: 2660e3f19262e0c1c514f7a0045fa503cee1831b49ccf21a997877b0058606e8

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