Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a579587cabd51e…

MALICIOUS

PDF

61.5 KB Created: 2020-11-18 08:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3f0938b583e450a2ceae51d3dad53438 SHA-1: d20166c6c30aa1ad9208891ffd758578102250c5 SHA-256: b2a579587cabd51ed59d7f6f59f8a8918ca5f2e6c03890d84d1aaa3944fc6c31
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 0.9996

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://traffking.ru/strik?utm_term=the+gentle+art+of+verbal+self+defense+audiobook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416321/normal_5fb453357bd85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386622/normal_5f976d6623761.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/8c0b4308-2762-4711-9b68-641771e1dadc/73908263203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45442ba4-fc5a-4b8a-846e-37336d5ac477/supreme_calamitas_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0566efe1-b1f4-4307-bdf2-d7363c966c64/57167424341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5204b37-e456-487b-9519-53be5ddb5d6f/real_estate_principles_a_value_appr.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/guzejaxegepijanijim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d5f1fb-e43b-462a-908e-0dea9ef5e27c/40865018483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7510a506-9073-4e9f-af6f-dd000ff7e335/makita_6095d_disassembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb54228-8061-47dc-b164-6255ea9db12b/guzoguwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8ffa261-15b1-4f99-8d38-2251f967120b/gonemefefokowojuvew.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/45725844022.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_off0000b370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB370 5380 bytes
SHA-256: 1e45ee0bdb0567556b8d72ae39a4726a22a93afd4ae63798c018374e8bcbe3d0
font_01_sfnt_off0000c5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C1 10712 bytes
SHA-256: 2428815f7adb0ce93745d8da1642b6bea422865e9756243112afb8515b21c9ca