Malicious PDF — malware analysis report

Static analysis result for SHA-256 423e893e2fb0a02c…

MALICIOUS

PDF

78.8 KB Created: 2021-07-14 10:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84d00af29e047e897af7a8cf4e0d9d15 SHA-1: 78410f8d49232ee9195935077910cc4b13a4c4e7 SHA-256: 423e893e2fb0a02c82e9482d3a2b461366118d7834d02d677b05528d661b7b31
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious. It contains embedded URLs, one of which is associated with a Google installer lure, suggesting a phishing or social engineering attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs indicate potential for malicious actions like downloading secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8678

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feedproxy.google.com/~r/sq/ugae/~3/NsX9ihectO0/square?utm_term=google+installer+for+miui+12+download
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7ddf146a8e17713e4d317/1625808369159/would_you_tell_me_that_you_love_me_back_lyrics.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee06c4ea8d40126a203e3b/1626212037035/47694403031.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed5f3450bb312daecd70e6/1626169140784/14941679942.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee5bb084a0477e84ad4238/1626233776938/80118250514.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edafd58b02447bbddd3b52/1626189781807/call_me_what_you_want_lyrics.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec82ba31b0b43e07e6bf54/1626112698751/povewowupavevogufen.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e902b1e6a58043b6904b3c/1625883313745/accounts_payable_interview_questions.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_off0000d27a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD27A 16792 bytes
font_01_sfnt_off0000ea8c.bin
4ff29ae6100be3fd65e581b692f21789b07ffc81eaf38b8ff8f89bc31e0cd12b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 15868 bytes
font_02_sfnt_off00011382.bin
7846dd8564e4e939168a33c95a9571319b924999dab584b95d7742ceec34c1eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11382 11096 bytes

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