Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8cad1b038cbe3d…

MALICIOUS

PDF

80.3 KB Created: 2021-07-12 20:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6b0c1c7f460a6fe12f6147193f9d796 SHA-1: b2ad5d084cb161e93a76ce936df7a928431cc709 SHA-256: dd8cad1b038cbe3daa24d596ef71113b03ec96c431b2d633ca12d303dcf07c03
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://crysiq.ru/square?utm_term=how+long+is+one+year+on+jupiter', which is the primary indicator of a phishing attempt. No scripts were extracted, but the presence of the malicious URL strongly suggests a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6198

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://crysiq.ru/square?utm_term=how+long+is+one+year+on+jupiter
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e92f1d563c1506a8b6a472/1625894685725/33615368507.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e932236e267257943b6967/1625895459723/64738766151.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec731def188817f7dfc4ff/1626108702095/dukilokodufagofuxevoke.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d960.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD960 16792 bytes
font_01_sfnt_off0000f172.bin
3e4ce75319b2c716e920b778d02941402951cd4796de467c0b81ce534f881ebb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 16516 bytes
font_02_sfnt_off00011c71.bin
ade35b5a296c2ce6fccdd405f1dd629cded92f2601f6c975fc7a3a4c589a7d1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C71 10848 bytes

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