Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c3c380eb5ad692…

MALICIOUS

PDF

80.0 KB Created: 2021-07-17 17:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bbc6b17af5fef74048a30bca38fb923 SHA-1: b8f572efc12abaa4c3eb6f2f75e06372e1805c93 SHA-256: 83c3c380eb5ad692f90f90638acd5e08132eda8cb6f117c184aba9fda2589be6
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a phishing classification. It contains embedded URLs, one of which points to a potentially malicious domain. Although the document body is heavily obfuscated, the presence of embedded URLs and the ClamAV detection strongly suggest a phishing attempt. No scripts were extracted, limiting the analysis of specific execution techniques.

Machine Learning

  • Nyx PDF Classifier clean score 0.0945

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/UkUWPC8UKDU/square?utm_term=wood+coffee+stirrers+1000+count
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec787c700aa07a7893a726/1626110076539/english_to_indonesia_translate_online.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0eb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0EB 16792 bytes
font_01_sfnt_off0000d8fd.bin
7a26c7f079c81c7ee6998840c2b68874ceb928cfad7283413bb41702a5e4e656		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FD 16884 bytes
font_02_sfnt_off0001045d.bin
8bcc070ff20c027f7494cea7f783612adf7e1b6d7f8765a9ac06f5986c6e82d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1045D 16204 bytes
font_03_sfnt_off00011a31.bin
4eb5f099bbb47f8e438aa273bd115f1f5da7ec5a826fa29d36d59370aad01ea0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A31 10528 bytes

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