Malicious PDF — malware analysis report

Static analysis result for SHA-256 bccaa19132e810b7…

MALICIOUS

PDF

77.1 KB Created: 2021-07-13 22:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 792039ae1350ed15afb4f9eb9308928d SHA-1: db017f2a6be4c5d5a004bf9320e5dc5b1e944fd3 SHA-256: bccaa19132e810b7f76a8b075aec4aaecd40e16a91b7039d7e416adb0088ff39
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF format and embedded URLs are commonly used for delivering malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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/r_nBws6J8g8/square?utm_term=mathematical+foundation+of+computer+science
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e80e8b80504e0a776ba37f/1625820811205/winpe_bootable_usb.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8e46212fb7d0b27901eee/1625875554564/13201882075.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e96122c0906550d90d0864/1625907490542/painting_terms_art.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edea47930ff80baa0d5b0a/1626204743339/85688972258.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec9c3dc81c37306b310914/1626119229894/products_of_pentose_phosphate_pathway.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_off0000cc6e.bin
9b36ba47051ebf86b7e81ba01af640cc787cae490e110323907864271c085712		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6E 10976 bytes
font_01_sfnt_off0000e5b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B9 16792 bytes
font_02_sfnt_off0000fdcb.bin
1c5141236e558f93f2adb8181b7e282da0f52d7d6637a27e6e2b90b9f0fe9126		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCB 15924 bytes

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