Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3d3434ca3285a4…

MALICIOUS

PDF

70.2 KB Created: 2021-01-09 04:36:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4bedbded827fa0c034db685cdf2b742d SHA-1: ecc159359d0159bde08ec156046caee3dc45a173 SHA-256: 2b3d3434ca3285a43727b69fc66842fde7e9c0c0b0eee68a3bc44b0545411e8b
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-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=how+to+use+gw2+launchbuddy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447663/normal_5fd67d1d5483f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382952/normal_5fc661ef8fb89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451350/normal_5fc7cb8a03eff.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/lewoguju-fosevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5f8bc7cc589de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471114/normal_5fb5fbf871de3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379613/normal_5fe2cd703a585.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407795/normal_5ff9022175835.pdfIn PDF document text
    • https://xemupawiked.weebly.com/uploads/1/3/4/3/134321325/343f23c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489725/normal_5fd144386d6a1.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/ad90c05d-0529-4ac2-9804-b1a9abff7e4d/dish_dvr_receiver_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/moe_golf_training.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/83186613307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb2cf871-eb0c-459d-b35c-63783e2404f6/vesivorizo.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_off0000d308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD308 5532 bytes
SHA-256: b0a51cd36cf3b30045a9e921a85ba34cb6ac46a125dc038157250b708b3b4840
font_01_sfnt_off0000e5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E9 11192 bytes
SHA-256: 28cc74581001197e7333b2af5998e0309afcdb6a9bcfd1f53ccea52dd747d0ab

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