Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76cb985dee93d97…

MALICIOUS

PDF

67.4 KB Created: 2020-12-13 16:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a7fc99396abbee93d7ae0607e7ec807f SHA-1: d59e49c5272d740941a918b67ec708b2894416eb SHA-256: b76cb985dee93d97bd35d2ece3e80e50dcdfc0a9579c7d845b1871df3e61abf7
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 0.9995

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
  • 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://traffking.ru/123?utm_term=final+fantasy+type+0+guide+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402501/normal_5f91297070cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384145/normal_5f98e4f8507b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405925/normal_5fd076e967042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478946/normal_5fc172844d089.pdfIn PDF document text
    • https://wojawodexof.weebly.com/uploads/1/3/4/6/134673733/9c3a17.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/busutafitufe/duwase.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/77784981541.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/osrs_ankou_cannon_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/420cbd98-2dcf-4284-9358-f4f9e95e2813/jolevofugefegar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd51c7d-3532-4692-bc97-39645256e361/76980404925.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_off0000c89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89E 5516 bytes
SHA-256: 0a159be2b2ee8e92709997f763f48774d565e7ff1366d3b6d047476f93c95d97
font_01_sfnt_off0000db84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB84 11392 bytes
SHA-256: 30a73b3dfbfbab44b47b2a608f7956778be8eb2bae921cea6a1681288816dadd

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