Malicious PDF — malware analysis report

Static analysis result for SHA-256 d004977f8183c090…

MALICIOUS

PDF

78.1 KB Created: 2020-11-10 17:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bfa0567b32005d74b3bf9eede829f04b SHA-1: 9dab150c54de9437685e8c8cbc3696710ee99f84 SHA-256: d004977f8183c0908f02aeed262fe8cfb04b18f6170d16cd7683b6c3ec00fa1c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 presented to the user as a 'user manual for kenmore sewing machine' within the document body, indicating a phishing or social engineering lure. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

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://traffmen.ru/strik?keyword=user+manual+for+kenmore+sewing+machine In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369313/normal_5f8f56bad9988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f8ee271341ad.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/36ce75ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f8febb9e7b48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_5f92a7b2bf051.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/ae1a7.pdfIn PDF document text
    • https://fisezofibidan.weebly.com/uploads/1/3/4/3/134316577/1024663.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/nanomegavilisoriwem.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/lezepasidixabazafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420612/normal_5fa61b63e779c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/42ac0f67-6499-4f87-90e7-99dc4c72329a/20_20_by_linda_brewer_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20536afd-ac82-42a2-a448-bbcea989d2c7/69528298018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc03ad20-6e45-4009-b366-505445eddc29/ashokan_farewell_cello_solo_sheet_mu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc53ab66-6976-4708-bfcc-258a997b3ba6/monopoly_property_cards_font.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 5244 bytes
SHA-256: 9751fb284b3abd6aa8fef0f4fc788e60c668fd485aa0c34dc3f824ee7e44658e
font_01_sfnt_off0000fa1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 10376 bytes
SHA-256: 5e9f4eea5425130d6cd6834ec33594d0c9a48909a9da986e187f0fe509b98d22
font_02_sfnt_off00011d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D39 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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