Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15dec44c964aaad…

MALICIOUS

PDF

86.8 KB Created: 2021-07-14 00:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2894f15dd6f12abb37d1b2abbe608704 SHA-1: da07bb7f110fce303c0fc401149c23f948fde57e SHA-256: d15dec44c964aaadf4218a22476d43aea05d4e06a1ab7271d0f4893ab2d22931
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 phishing attempt. The PDF contains embedded URLs that likely lead to malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to external resources, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9606

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/kVSxLQpkboc/square?utm_term=first+digits+of+pi
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecaa6cf9183728738a7f32/1626122860809/1979_d_penny_value_worth.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edff7fe83f616bcf866f77/1626210175433/23049182754.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edb8095860d606f48518e6/1626191881913/43721411458.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed3394dacdbe35d62741d3/1626157972825/batch_file_find_and_replace.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edff42b0089c62dc41e893/1626210114602/siwazogonubulodegep.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e772fb9213031c8d41f867/1625780988169/37.2_kg_in_stone_and_pounds.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edd8d7a4137771ba0171a2/1626200279768/44658018369.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed924f4918f36a6d624c3b/1626182223801/50822255252.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_off0000f36d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF36D 16792 bytes
font_01_sfnt_off00010b84.bin
352013d25fd892daa6d60f79f781defa7ab239a3df767d2e91cf35a7e4e6b201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B84 10208 bytes
font_02_sfnt_off0001223a.bin
c139597d09ae0c997e9ef8181a678356efe00191128924c133675e7b04b82d33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1223A 16740 bytes

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