Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc7316dc11f0eca…

MALICIOUS

PDF

67.1 KB Created: 2020-11-16 17:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8ccc3bead07dba9cca3f583661021b0f SHA-1: d9b074a8a9e42aebd187a592fd3647da011ebf6a SHA-256: bfc7316dc11f0ecaa613a12b294b7a87bacfe780c195792e9e2232ebc0375860
96 Risk Score

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 0.9998

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://trafficel.ru/123?utm_term=atomic+structure+worksheet+answers+key+chemistry PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f8970ef9aa8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f873c13e0033.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/luborinizu/free_accounting_spreadsheet_templates_for_small_business.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/3663323119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/347d70b5-ac12-480d-a71a-4526b3d21a51/66761666741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e9982ae-0524-46b4-898e-a2e335c39326/89322003694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab76c13f-d1c1-4970-a454-8a360e252b84/dirudofagekepibazubifoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/download_games_car_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/14106199528.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/versatile_performance_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/apricot_glazed_chicken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332893c1-3cf2-409e-9870-535920366665/30579880383.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/julius_caesar_english_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/21107429118.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_off0000ca2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2D 5252 bytes
SHA-256: ffd2eecdf46fcb5fc4f72bcba27f81b7b2d04b588ef541307351dbfc75918d01
font_01_sfnt_off0000dbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF8 10264 bytes
SHA-256: 3b42e0371df17baadf1f75cf602e967cace9bc8d99adb38bced0afec9f658af4