Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d51367a6cc66554…

MALICIOUS

PDF

70.7 KB Created: 2021-02-12 14:47:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 25cb7580f56faf3bb7988c5979fa37d7 SHA-1: 607dc880abd24d151b76c07b7ac9cd1b54b371de SHA-256: 6d51367a6cc66554d3235d252272d9f85d0ab213522d1c95d7c57b97185f1e2a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The document body, though heavily obfuscated, appears to reference a game guide, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/wix?keyword=mass+effect+2+prima+guide+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407998/normal_60079b6bb39df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5fd77ad94fdbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415929/normal_5fe852b4578d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fcf31ef11a66.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/mexesazaxasa/plague_inc_premium_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/answers_defensive_driving_test_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/movusuxa.pdfIn PDF document text
    • http://botiximura.epizy.com/roblox_shirt_templates_that_work.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/80508739601.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/mijefur.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_off0000d8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F8 5580 bytes
SHA-256: a6b8a9ef2e39b47c25e9fde456150026e02e64d92ecfac4d32cd5332357fb421
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 10184 bytes
SHA-256: 8934f2c5556793614447760a72d366f35458bf807d6d38a32a73be7f4751205b

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