Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d95ee98b029e6eb…

MALICIOUS

PDF

75.8 KB Created: 2021-01-05 11:09:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ecaeb335d6b2bbda02c940501d94a824 SHA-1: 1eb0367c7ced398234ca0ef79ecd37614e90e572 SHA-256: 5d95ee98b029e6ebc2f1ddef05c86e3ec98c276fc6968bc16b3b01278339a83a
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://traffking.ru/123?utm_term=pinewood+derby+car+kits+hobby+lobby, is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lead the user to a phishing or malware distribution site, consistent with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffking.ru/123?utm_term=pinewood+derby+car+kits+hobby+lobby In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f8875fb701d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f8a5122a0066.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420039/normal_5fe0719ff3749.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408464/normal_5fc860811986c.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/nJjaQI0/dollar_store_deals_online.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/koserozida_zafepiputewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5fd30d55eef98.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/86be1643-9eea-48a3-a02c-bf3a856addde/wukamasotisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c736fb7b-76d4-4417-b15f-7c0a52a18b48/bsa_disabilities_awareness_merit_badge_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/blue_belt_karate_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47bc9c5-4eba-4720-a29b-2320331903ae/wi_daycare_licensing.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_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 5424 bytes
SHA-256: 0217d2ee69388a2fb6d28a5b6dff38bc880626b71aee7e7e714a655d6c3003f9
font_01_sfnt_off0000ff60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF60 10412 bytes
SHA-256: 5de0f0607cd2f40518b5d900d39160a9f63321bcb71bca400dc3b59baa4b4460

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