Malicious PDF — malware analysis report

Static analysis result for SHA-256 58997ce41fc3a7ac…

MALICIOUS

PDF

67.6 KB Created: 2021-01-07 06:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 77e491043f22e97c0aff360f044fbe94 SHA-1: 2389a9b122f23252a49f4083537b1535f3549774 SHA-256: 58997ce41fc3a7ac06db15cd4197b2ac25edb13a6baa0b053de747272b191df7
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 'traffmen.ru'. This URL is likely used to host or redirect to a malicious payload. The ML classifier and ClamAV detection further support the malicious nature of this PDF, indicating it's a phishing or trojan 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/wb?keyword=shell%20clubsmart%20apple%20pencil In PDF document text
    • https://static.s123-cdn-static.com/uploads/4367643/normal_5fede93c0eb30.pdfIn PDF document text
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/1791318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5fad8ffb9a2dc.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/yHgMhja/sportsmax_app_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5fcc2d5b0667b.pdfIn PDF document text
    • https://cdn.sqhk.co/gisopagipize/qEgeidM/28332074122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482863/normal_5fab19d565c60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450728/normal_5fa6874ad6ba4.pdfIn PDF document text
    • https://fimezerix.weebly.com/uploads/1/3/4/4/134478386/bolajid_lezusojiboro.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/lorubavevotu.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/3fa1d177-2f1b-4807-b21c-ec52d4385756/ph_miracle_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae362e0-4ed1-4dae-b4a7-f26383acbf88/surpassing_all_dokkan_guide.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_off0000c918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC918 5416 bytes
SHA-256: a7e3e97c891a5d04131fc5a8d62f705fc056ffc84ccf451da4da0e2d9e2bdac0
font_01_sfnt_off0000db50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB50 11916 bytes
SHA-256: 2adb7244063435f7eb615d3f3a495a7b636db4772a601be5df2f20fef029a3cf