Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c7aa4bc02d37f9…

MALICIOUS

PDF

78.3 KB Created: 2021-07-16 11:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ef68e5ee3574df43503b34bec77d497 SHA-1: 0d0794eecae9df95aa5e2a7d00e60706a286e763 SHA-256: b1c7aa4bc02d37f9399732087535e0c423b0efb9572207030b2410fda52706f7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers. It contains an embedded URI pointing to 'https://archism.ru/square?utm_term=medieval+ii+cheat+codes', which is likely a phishing lure or a distribution point for further malicious content. The PDF structure and embedded objects suggest it's designed to exploit vulnerabilities or trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8374

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://archism.ru/square?utm_term=medieval+ii+cheat+codes
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee7b7a462f394a1e45bc86/1626241914859/largest_tea_producing_country.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e05acc7c0864592377c1/1625874522796/40967482049.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee0b626bb0602df20db28e/1626213218797/90599958175.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed6f8066c2900cf560f537/1626173313055/godzilla_king_of_the_monsters_online_watch.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efeec36611482e0a901ed2/1626336963586/wiliwujugewilavipul.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_off0000d374.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD374 16792 bytes
font_01_sfnt_off0000eb8b.bin
aeded5d8e9391c75d8f3c373327b929f7c9f736205d3ae8e31cbf2ff7a07121e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 10324 bytes
font_02_sfnt_off000102f7.bin
0353b4235b2765964d1d480dba89e7363829fb69495bcfc93fc968dcf3e2d044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F7 16848 bytes

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