Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdbddb57d7988d6…

MALICIOUS

PDF

80.9 KB Created: 2021-07-13 00:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bec0ef40d75539819cf9cfc400e5b9fd SHA-1: 0c11f93a9942cd4fa26fa387ba22e37e6517977c SHA-256: abdbddb57d7988d6904734a0103bfa8af6bf62423d0ff2a068986035494a3f11
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV with the signature 'Pdf.Phishing.Trojan'. It contains an embedded URL pointing to 'https://coretry.ru/square?utm_term=luther+on+repentance', which is likely a phishing lure. The PDF structure and embedded content suggest an attempt to trick the user into visiting this external site.

Machine Learning

  • Nyx PDF Classifier clean score 0.1467

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://coretry.ru/square?utm_term=luther+on+repentance
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e86efe36ee9e0d9b3caf35/1625845502111/all_angry_birds_movie.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecaeaab06780101958dbb6/1626123946572/zekomapuzodupelifimotajum.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_off0000dce4.bin
ee7121c1f47606ebba1879980659e5bea8edde1a392a76d87b35ab4f75251ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE4 10220 bytes
font_01_sfnt_off0000f3c4.bin
d00b25c70026990f8058cf7ed7e917f592011864f850878a7f86fb117afb5e67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 16604 bytes
font_02_sfnt_off00011edd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDD 16792 bytes

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