Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9852c214b4974d9…

MALICIOUS

PDF

65.3 KB Created: 2021-02-06 01:57:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5a94be31113c3cf09b6a700e51a84961 SHA-1: 9a0aef8e66acabb048cbb652ea334e059d44a451 SHA-256: c9852c214b4974d9197cd2a25986a48c5fbbf3e5342c01588db62a32b7ccc644
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URIs pointing to external websites, suggesting a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely delivered via spearphishing.

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://bologen.ru/123?utm_term=monster+hunter+girl+encyclopedia PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373522/normal_60035ee2df8d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_600e5af6d1d82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402721/normal_60021b55b524d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407997/normal_6001914031464.pdfIn PDF document text
    • http://regvoolkim.website/calculator_windows_xpncjxe.pdfIn PDF document text
    • http://daating19.site/22720710261s7qbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421471/normal_5fd7ad3ec8392.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470835/normal_5fed90ced367f.pdfIn PDF document text
    • http://itwow.info/21402950657r41om.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366973/normal_5fef350b2e390.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490272/normal_5feb07e776cc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367278/normal_5fe307353cd11.pdfIn PDF document text
    • http://matteset-spon.space/kimanajemetomivdf25b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484093/normal_5ff29dcb84adf.pdfIn PDF document text
    • http://dimax-matrasy.ru/free_robux_no_verification_2020_october40f47.pdfIn PDF document text
    • http://myfavoritesun.xyz/fundamentals_of_engineering_numerical_analysis_solution_manualzsz3w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447880/normal_5ffb84fddb15f.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_off0000c3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F1 5444 bytes
SHA-256: 2fd69130b361a1092cf0c9eed78ef091a88f9e73cc7fbb6a875e2d3baf19d7f9
font_01_sfnt_off0000d681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD681 9856 bytes
SHA-256: 7c879dcd2a90d6dcfda70aeccab9864e7c68862dc5ede2c1a523987682e3b807

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