Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04c22b09a17b28d…

MALICIOUS

PDF

85.8 KB Created: 2021-07-21 03:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e951870b0a8ea8209065754b66ea3382 SHA-1: bf97e560e8f414f2996f42b58c5d00f75e7b0c1a SHA-256: f04c22b09a17b28d93440c626a7c7281ea0c8eef3cea56fade15485259009ec7
96 Risk Score

Malware Insights

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

The sample was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs and the PDF_URI heuristic suggest the document is designed to redirect users to external phishing content. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly support a phishing or exploit-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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/eoPDrVzwpx0/square?utm_term=bloated+for+days
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee6eb9df274736e0ae9a81/1626238649812/70519346769.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f66ae7351e882d924268e9/1626761959441/gawakozodowul.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1b92d18bf3a1fcf062cb7/1626454317569/spurned_meaning_in_telugu.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f277007f94c710fbbc7d75/1626502913096/vefexeledefatidukusuzalix.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f53cf0952f835132eb41ea/1626684656565/vefulimavosimax.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecc72b8cc5f05e71da3465/1626130219539/lupisojagije.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f2f65c04a1d9701796d0e1/1626535516217/32686725017.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7be95a431ed42d2fa7ad5/1625800341218/veweredutilogemeno.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f53234ce637c25834fa4a9/1626681908275/raxepepiwut.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1c17c3aa4903ad6e1bf40/1626456444285/69272300107.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f49be222602c08cafe13f6/1626643426658/wupaxenezozubipew.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_off0000ef6f.bin
edef5041e0312d6279ded95ac77e6f2fc039678c36fc96ce3ad3aec82f4b3f0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6F 10316 bytes
font_01_sfnt_off000106ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106ED 16792 bytes
font_02_sfnt_off00011eff.bin
4838cd4cc476265b8c39e6beb0fdf24b7939233459bc91671ba4a2b1c88dfce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFF 17132 bytes

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