Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbdf27bad0a032a2…

MALICIOUS

PDF

75.1 KB Created: 2021-07-13 17:38:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c62f2cdbb4be24124198264e7ebd10d SHA-1: 0be253400967dacd20b71b7dab5f566b24fbead6 SHA-256: fbdf27bad0a032a2fa3014ecd83c6acc2283c1ed30b8840344524a07975c1a62
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. It contains embedded URLs that likely lead to malicious content or phishing pages. The presence of PDF-specific heuristics suggests exploitation of PDF vulnerabilities or the use of embedded scripts to achieve its objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9186

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/~3/4aHNpQc2m6I/square?utm_term=sexy+words+starting+with+k
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7fa127be683581ce3c1ef/1625815570148/fefudifejunituwujomow.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90cd1e6bd1231e6072765/1625885906044/tozusolesesu.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8d449c874e7142486387/1626115396255/3399748163.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed9f87920f291d3920b32d/1626185607573/name_two_types_of_sedimentary_rocks.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eda4515d4dee687f493304/1626186833587/sausage_party_free_download.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_off0000c9e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E2 16792 bytes
font_01_sfnt_off0000e1f4.bin
a12b56ce3a91166d25eebf02f2c5a7f4579207e864da382fb139df4a8f708834		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F4 15048 bytes
font_02_sfnt_off0001082d.bin
1d1d52fb0e1954b53c044e9bb1c05aa21fc6e510ef6a6511f0e05cd9c8e7ac6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 10952 bytes

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