Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1834e7c3bb0b99f…

MALICIOUS

PDF

74.9 KB Created: 2021-02-24 12:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 73cbaf2b1f5010c87b9793401ee1505e SHA-1: 609e0c5907f7240128dcfdd2377228de926e4b48 SHA-256: f1834e7c3bb0b99fa7915ae47e598fcd46fbb10d88c457576d3a6aa05764bfe8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs users to a suspicious domain, masquerading as a search result. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of a malicious URI is a primary indicator of compromise.

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://druttle.ru/wb?keyword=what%20are%20some%20examples%20of%20allusion PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478123/normal_600ca44a9a683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_60263ee940081.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454289/normal_5ffc69349259f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_601e880c46870.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/himihj3/85631458801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415935/normal_6030d67d536a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490515/normal_5ffad987d1b12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419195/normal_5fe91585e9d26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_6010609eb0563.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5ff4de23a8a6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486984/normal_5fdbd19d592cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450036/normal_60123425d6f88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_60360034f0bcd.pdfIn PDF document text
    • https://cdn.sqhk.co/tabakotodi/gegewhi/93158000902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368964/normal_5ff3fc91815c0.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/ojgwDnW/geometry_wars_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE981 5220 bytes
SHA-256: 0f97ddeb74c8782b2e77def076dcb083012214805a43b7699c96c00b3d4abd35
font_01_sfnt_off0000fb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB27 10424 bytes
SHA-256: 24b32b97e632651e0f42388bece4a7bce2a292e12ab30f83007b70687e05c942

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