Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b40f69f823aa88…

MALICIOUS

PDF

73.1 KB Created: 2021-07-17 11:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b419a02c22d73ffc11e44733b70dc3c7 SHA-1: 29c88af5d35d5aaf858a233d9539174aa277cc40 SHA-256: e2b40f69f823aa883ddfc7a0d84caddae831ab46d46afbce47a90aca05f86c96
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that likely lead to malicious content or phishing pages. The presence of PDF-specific heuristics and embedded URLs suggests an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8216

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/CHqDoFjlE84/square?utm_term=strive+to+do
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eda5ecb564270cd6e9ea33/1626187244806/what_is_supporting_details.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e916b0c22c005c933840f1/1625888432817/official_guide_for_new_residents_book.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec83d43f7a034ccb7aa407/1626112981074/61954376922.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee7c128feeeb055d9dbd37/1626242066891/95435723932.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7c91023621b4743e32c74/1625803024412/ximenor.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_off0000c0e4.bin
c1efad233ec35408fd0fc2d34958513fc37df92834ddcb8c1a11700e01fe0cd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E4 16260 bytes
font_01_sfnt_off0000eadd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 16792 bytes
font_02_sfnt_off000102f3.bin
471df9484bda6f38b9c212b931901253b0ce92740ba0064d14538e78adbb7c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F3 9904 bytes

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