Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5d10c49fbae02d…

MALICIOUS

PDF

75.3 KB Created: 2021-07-14 06:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a08b27e6df351a418eca3f2e9aa3a8ae SHA-1: df3f9f87ca37336ed5bb4dd2dd9f32e7c4439d1c SHA-256: 8a5d10c49fbae02d6e4418c94ef9150316099362e29ceee25743a339e6a0cd7e
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV detection and the presence of embedded URLs strongly indicate a phishing attempt. Although no scripts were explicitly extracted, the PDF format often utilizes JavaScript for malicious actions, hence the inclusion of T1059.007. The file's structure and embedded URLs suggest it's part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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://feedproxy.google.com/~r/sq/ugae/~3/ZV5PD9BTPXI/square?utm_term=3+foot+4+inches
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec76bd54a52c186ce39d0a/1626109629202/how_to_pray_in_english_in_church.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8e203f4fe78435a3730e0/1625874947154/83704906837.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_off0000c842.bin
b878aa8630f48613361d381f7a69fdd6cb397429724fab3b9aa86f23f76d233e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC842 16412 bytes
font_01_sfnt_off0000f2d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 16792 bytes
font_02_sfnt_off00010aea.bin
159e19a383a019113f44067b699f0870bd893d26fae1a62e8d748e94a17d33bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEA 10276 bytes

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