Malicious PDF — malware analysis report

Static analysis result for SHA-256 505e4910301c4fdd…

MALICIOUS

PDF

70.8 KB Created: 2021-07-16 09:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 530485fe761e59c821cc2aaf6eb193d6 SHA-1: 9e47bc7b034c663509ebf7736e73b8b20dca4890 SHA-256: 505e4910301c4fdda5f30190cb71874cd0e6046cd3ba27a1b7db49d4265b892b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to a URL that suggests editing a scanned document online, combined with the PDF structure, suggests a phishing or social engineering lure. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6030

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/AnJPYMJXbyQ/square?utm_term=edit+scanned+document+online
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e90a22c14ff043cd5bf47a/1625885218156/living_with_someone_with_bpd.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f003a339c5d52effb6a2f7/1626342307739/dasuk.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7ad7fe047727940aaea0/1626110679225/difamo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f112c30a71fd0da9acc7b3/1626411715634/4179101858.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_off0000b70a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB70A 16792 bytes
font_01_sfnt_off0000cf1c.bin
6178b4b642fa6e6857d49cdfddec5f4dfdfcb80bfa65b3d262adf1399ed09507		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1C 15740 bytes
font_02_sfnt_off0000f79d.bin
503289ebd86ce3fc6aeb5d012568af66ff3009610e543c67be1a8ce12ee65669		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 10512 bytes

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