Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d60bbce936a2c9d…

MALICIOUS

PDF

72.6 KB Created: 2021-07-12 22:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 81f55a6cf1493f0f434cb3f32430f7ca SHA-1: d9b8d3068c59cfe17abc2a637777b03a6fe83ee6 SHA-256: 0d60bbce936a2c9d7b7ccd09e38d37e9af1e3d5cd4ef53bd118b97d963100df2
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a Pdf.Phishing.Trojan signature. It contains an embedded URI pointing to 'wastran.ru', which is flagged as unknown reputation. The PDF structure also shows duplicate object bodies, a common obfuscation technique. While no scripts were directly extracted, the presence of an external URI in a malicious PDF strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.2209

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://wastran.ru/square?utm_term=red+of+roses
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e904d412fb7d0b27923189/1625883860554/reese_witherspoon_ava_phillippe.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec85617e5cd11affcd6ca2/1626113377816/31518677598.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_off0000bf80.bin
54c424cfd794ffb2f94cf9ec1150f610c408574cd3c93c8265c7104f82671a43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF80 9888 bytes
font_01_sfnt_off0000d564.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD564 16792 bytes
font_02_sfnt_off0000ed76.bin
afc0419e4dcd035933b820aa0fa5bd3bf2a4078352cdb8cdbf673660566797a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED76 15976 bytes

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