Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c67aa9699e42ba8…

MALICIOUS

PDF

67.3 KB Created: 2020-11-19 07:26:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b13e3ccab23c026b2a00a92c33173e7e SHA-1: 2d18a6329eb4ecf68715e2f0df655fd7fa1f1b6a SHA-256: 5c67aa9699e42ba82f8de5ed176b96e24aaf3d9b2a5c5a512de352a309d45448
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URI pointing to a suspicious URL, likely a phishing site. The document body, though heavily obfuscated, suggests it is part of a lure, potentially related to 'Descartes error goodreads'. No scripts were extracted, but the presence of embedded URIs and the overall detection profile strongly suggest a phishing attack.

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
  • 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://traffnew.ru/strik?utm_term=descartes+error+goodreads PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445531/normal_5f9dc69ae7958.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/6626404.pdfIn PDF document text
    • https://murudogukezopo.weebly.com/uploads/1/3/4/3/134320821/9422734.pdfIn PDF document text
    • https://letuwolisabir.weebly.com/uploads/1/3/4/6/134602086/d90d4eb8a260.pdfIn PDF document text
    • https://zafitageleg.weebly.com/uploads/1/3/4/4/134489703/lefanafa.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/2d3c0346-3d7d-43bd-a37e-f0214953c2f2/pokemon_3ds_emulator_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/468460c3-e016-4128-be02-7018e6132a0e/buwenixidirovanapuwodakiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0477af26-ffc8-498e-8e72-65f345be81e7/49170110678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bff6b00-f3d5-4727-9011-1dd456358ce9/65859225827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f97e149c-bc69-4f76-bb96-a8d240a2fb21/aashto_lrfd_bridge_design_specificat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a743fe5-ec5b-487d-b3de-e3fb93b708ae/38478518903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653215f2-b78e-44e7-989a-b3e03a993c32/me3_tuchanka_mission_order.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_off0000c79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79C 5076 bytes
SHA-256: 8f555ebe207fde19bf558bc215ab20e773dc0927acf7df9a2a245e9f66740c26
font_01_sfnt_off0000d8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F1 12624 bytes
SHA-256: 54409cc4bc281a323f3e537725fd7986e35d69292d2049619926d249c52ea5ef

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