Malicious PDF — malware analysis report

Static analysis result for SHA-256 917985537be9de6a…

MALICIOUS

PDF

76.5 KB Created: 2020-11-18 16:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 415f835bf269faddf9eb1a0f0b0fcdde SHA-1: 7ccdca8a2e49e0476a3d1aedcaee3bc4861e5f0e SHA-256: 917985537be9de6a4af38fb011d9bc75678378d03183f6a0ecc8ba6d47d83058
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://cctraff.ru/123?utm_term=linear+ld050+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f9c7d15c8ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5f9e2b2364c4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_5f9b177dbb810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475209/normal_5fa9639638a93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5f957ecad1824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f887e7f38445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5f8b99672815c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413126/normal_5fb30dfb0cc8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f889163a480e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f9b7c46ac805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f91e3a6a94c9.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/d752f976-409d-4c66-9cd5-7c7525a75b92/wefinanisuj.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/kegevixonesiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b0db07-cfde-4559-a6bf-17443d459a86/figurative_language_worksheets_middle_school.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 4692 bytes
SHA-256: 66357a109700c5818e05e2f61d4965f21f8b7cbe6149f4adae342240c66912cb
font_01_sfnt_off0000f1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C9 10884 bytes
SHA-256: 90a81af6fcf1298efc405493ea20cf831f46116360979231ecdda202e472798a
font_02_sfnt_off000116dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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