Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a02ed260162e61…

MALICIOUS

PDF

67.9 KB Created: 2020-12-16 15:26:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a258b860965bd2fdfc99f9f64c3b44b7 SHA-1: 7a04302267c92a5677362a09790106d656a29dbb SHA-256: f9a02ed260162e61b9d5105d8bae26b45fdc13c2e6ae6360064edd4bdae2603e
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://cctraff.ru/123?utm_term=simple+predicate+verb+examples'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The embedded URLs and document body, though obfuscated, do not provide further specific details on the payload or exact attack vector beyond the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/123?utm_term=simple+predicate+verb+examples In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5f879b270b9f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5f8c937795dd9.pdfIn PDF document text
    • https://mulaxenowaw.weebly.com/uploads/1/3/4/8/134862071/dutubakenopupi-wijarubofam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f8743182cd1a.pdfIn PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/xevowesawepuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c462278a-f9a9-4e07-9354-3ea890214dd4/27120971842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb2236a-59d3-4219-ae9d-97ce9024d175/99684295852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c4b40a-d5db-467d-91df-9ba052f40086/dragon_ball_z_budokai_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e74ec2-cce8-4de0-9d70-91acaa995906/34938561428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d389092-fd30-46d9-b766-4de47dcbdae1/my_hero_academia_movie_free_stream_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ebacf37-d8c8-4257-972e-847906ad97b9/google_sheets_absolute_reference_shortcut_mac.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_off0000cc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7E 5588 bytes
SHA-256: 5f42d32d1561668a90c856f623c7b71280a2d3c9b0b535178dbe1f20a5a82b86
font_01_sfnt_off0000df63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF63 10432 bytes
SHA-256: 1109006d260f28f2398394c503c7be1e2a39a7b5855b27e473fe133d434fa101

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