Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5d09642bdf3a39…

MALICIOUS

PDF

84.7 KB Created: 2020-11-19 09:34:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 311f40b377cec283e867c1fa5b6490e1 SHA-1: 53e98f1292610b1aa1504b5c93884b011ffca205 SHA-256: 8a5d09642bdf3a392aa7df86c1fb125f953e90964db7821b8904eef4e22fe697
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 0.9994

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/strik?utm_term=fender+excelsior+schematic PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407996/normal_5f98d8c1eb35b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5f8b791d6da58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468537/normal_5fb431c24d32b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5fb2f4aaa4606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5fa4447c48cf1.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/bulikowexunepov/stark_state_blackboard_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33e4ed8-43db-4620-8b8c-60ceb9962a4e/notario_publico_lima.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/dokutomupevi.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/33990519053.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/amar_chitra_katha_mahabharata_download.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_off00010ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE8 5200 bytes
SHA-256: 1aea2e907ab478ba4de3d01ff4c23e812a9802c8e0ac0e9414e97c3ed1398578
font_01_sfnt_off00011c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C70 11872 bytes
SHA-256: 93d142356538aaafcf45ae2ddb5af79d83241ba3e0d03b540ba636c6ed81c9c9

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