Malicious PDF — malware analysis report

Static analysis result for SHA-256 d222f766970ba3ba…

MALICIOUS

PDF

78.3 KB Created: 2021-07-15 22:39:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5b28637b2b47fb4b8a8f259597c1050 SHA-1: a17463576a973a4d2d63b601c9561959774dd39f SHA-256: d222f766970ba3ba9a654f6e8d14001a55a8be31ac89a0607aa05830d0dc292d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to redirect the user to a compromised site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8678

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/razvivatel/yapz/~3/kVSxLQpkboc/square?utm_term=how+to+find+heat+of+reaction+using+hess%27s+law
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7bb096e46386ca3bedb69/1625799433209/61612914127.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec78ebc217102653d50d07/1626110188047/tisexesamonixuzedi.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee3774115d504d3a85ca58/1626224500527/should_trees_have_standing.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ede3bde11d817478d289f9/1626203069994/how_to_make_drawing_in_word.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f089349c340534893c3245/1626376500241/watch_produce_101_eng_sub.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8eba9a1cf201f8058cc7/1626115770407/trollope_and_dickens.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edf475ad58ca03d2292333/1626207349398/63446905197.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_off0000ce8b.bin
1bcfb61a23538a22ba35f5982294d5306e590c7c06cf15f3b78159187f7522d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8B 16700 bytes
font_01_sfnt_off0000f9e2.bin
5e92062f6f716f8db3fca5b3d6c4d75038a2e168441990f45f220832ba32961c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E2 10968 bytes
font_02_sfnt_off0001131b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1131B 16792 bytes

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