Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b381aa9a2f5650b…

MALICIOUS

PDF

66.6 KB Created: 2020-11-19 07:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9ff8fe1fd613ede413e1d409eb9e5450 SHA-1: dec9cff160d79c300c88f34ad49c94d97010780e SHA-256: 3b381aa9a2f5650b0ad7b928ee4dd8f728b27a5775b7f9297129de56650c21ba
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://traffmen.ru/strik?utm_term=maneras+de+amar+pdf+libro+completo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5fa3e3b0c538f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_5f9ce21e6f3f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403685/normal_5fa2a0d69ef12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_5f9e1d02f3cb6.pdfIn PDF document text
    • https://seguronudolag.weebly.com/uploads/1/3/4/4/134468074/zutajavixetoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382405/normal_5f982934567ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450878/normal_5fa82c7dcd88b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403959/normal_5fa9d37da9134.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/6274823.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/79d3f261-62e7-45c0-a720-8619adf3c3f0/nitirij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b7a8dd-eb38-435d-971c-7ef5a650ba98/zonavaruguwumodajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a4de995-b530-4a2a-81a1-0f7018ccea43/18027367443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c0635b-ea2e-4c7d-ba75-2617e97eb614/algorithm_in_c_by_robert_sedgewick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9546aaba-a0e1-4886-9125-548dd686976e/vehicle_maintenance_should_be_a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc6e9efe-027b-48b6-95ec-2cdd54e691fc/tots_els_digrafs.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC50B 5448 bytes
SHA-256: 996c1e66a2a5f40fd8352a6f907ec7d3ffe1654504c2337293617618da9ee48c
font_01_sfnt_off0000d781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD781 11172 bytes
SHA-256: 73db3133f09ea2a4a524824a051d39a7cc1021ebbcedf7e8adb28ab734e707f0

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