Malicious PDF — malware analysis report

Static analysis result for SHA-256 d331480e55fcb7c9…

MALICIOUS

PDF

79.3 KB Created: 2020-12-18 19:20:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c3201b84ed7665e6db54d2a80891d507 SHA-1: df4da8a90878d3e38388bbffc5a85043a4606f1e SHA-256: d331480e55fcb7c98d756408a273d2f276549aa2813242e1f440ecde9fe8a96e
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?utm_term=kayak+bike+trailer+amazon PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kujapomib/lilanomurezitagazazefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02968373-6cd7-4848-ac9f-221bb893d268/72028513437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91802c0e-d3b8-416d-b37c-860b0ad2fc0d/st_louis_de_montfort_parish_oak_lawn_il.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/bolshevik_revolution_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/numisijiruwalitanezuwev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f59f380-e39f-4e10-adec-44864b16a004/mimics_all_you_need_is_kill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6689c402-2c70-4488-9822-798818da992e/21169778723.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/autodwg_to_dwg_converter_2018_serial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6fc042-ca5d-4f4d-a8d2-4e86be8ac64a/busemovijugafor.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_off0000fd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3B 4980 bytes
SHA-256: d7d7e2f597ad9cad6c50dac81620da0bf97297b82ec8d41549c3ec7f25a84e52
font_01_sfnt_off00010e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E27 10220 bytes
SHA-256: 0c3b4da28934000fd38512dec01f9467170f76d7a6f7fa6a86b10c3fff9571ce

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