Malicious PDF — malware analysis report

Static analysis result for SHA-256 25dbdb018a745b8c…

MALICIOUS

PDF

66.1 KB Created: 2020-12-21 21:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3645d2a1813d72e18eb2964cd18ffa0a SHA-1: 9a27819f8db07e891eade1addbd8e2514691ec03 SHA-256: 25dbdb018a745b8c1063fe1277048013459e7d1880a554ed7a063b398d9f3035
162 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 'traffking.ru'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The presence of a 'download button' heuristic further supports a lure-based attack pattern. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=zombie+age+3+download In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2a81ee5c7695ca9a6fa19/t/5fc3af897acac6192a30f254/1606659978510/xonugapasenutuwufojex.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc789d6f140fc3aa58a2e7b/t/5fd6c13b034a586a4f5275b8/1607909692278/arabian_nights_aladdin_violin_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a4096b97992eb57be95c/t/5fc9bce8822fbd3263ddcc6f/1607056621022/universal_studios_orlando_islands_of_adventure_restaurants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e35deef-52ce-412e-b655-e30a6ed13878/62925292765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1bb7fb-a344-4940-a3ee-6b48e61f9e1a/zurugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12345e67-0520-404e-877b-3efa6b5191b1/85630365101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a42cc9-0fb8-4f7b-991d-40f616670cde/kaliman_los_hijos_del_sol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0747435a-4bca-4da7-a5da-ac1ba1f3cf49/dekimakarebixa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe15a4bc819f1cf4a0a174/1606292900831/2005_scion_xb_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9800136e-be32-42ba-ac18-54c2a64ee293/batter_up_bakery_maine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ef8fc8-0864-4d8c-bcd8-81753e6487a4/76772008353.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e940bd14ff0dd29cb4d3/t/5fc3c9be61e25426e1ab94e4/1606666688075/94667523845.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_off0000c680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC680 5224 bytes
SHA-256: 4c607a3ed78d2b5d399efbd81638ee75c30e80fdd3bbcae9eea55a6600d5af22
font_01_sfnt_off0000d84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84E 10388 bytes
SHA-256: f27c2836c58a60c505ecb6bb7109459f70d092d14d5701ebdc378331eba389ce

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