Malicious PDF — malware analysis report

Static analysis result for SHA-256 3590cef544f1714e…

MALICIOUS

PDF

73.7 KB Created: 2020-11-25 04:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 69f2cd02572abfaa7d2ad89557a7b347 SHA-1: 26153151166f7d7c5eae476a4f1a2d11a15be820 SHA-256: 3590cef544f1714ec4103d915716b4a48a7423d51a94898d71e7bd331d73c1aa
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 0.9998

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?utm_term=zombs+royale+mod+apk+happymod In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410443/normal_5fbaa106e6ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_5f9381367d853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_5fae993045f52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386595/normal_5f9982ab8e264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474980/normal_5fbbdbdd0729c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_5fb9e332bcf36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465691/normal_5fb2f488a8a5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/jexazibelijimelidipawos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e1422f8-58f8-4c49-a8dc-b7363aac0571/memuxeboxunewufupuwivarew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/496307c5-0eae-46c7-a27a-5cacaa67887c/unblocked_electric_man.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fc9c9c-7fbf-4ddf-9354-74d9262d5113/9019012980.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_off0000c6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A1 3508 bytes
SHA-256: 308d5cf29967dea127db09c71ea76c62d9e145eee1accbfef27b3cafaf0cf6d7
font_01_sfnt_off0000d328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD328 5460 bytes
SHA-256: bb7f9814307c7fc4675a89859e1449025162b981ab83c0018479c5aebd4ace53
font_02_sfnt_off0000e58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58C 16436 bytes
SHA-256: 236b84675481e971b594d59cab427e764894a5735beeb766b1e13a4b757c3259

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