Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee756b7d4a016f6…

MALICIOUS

PDF

94.1 KB Created: 2021-07-12 23:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 503e2dd25cc28b6ed727c681a584ce62 SHA-1: e68383b44d23f804bd24c38d2898fe2b788ba501 SHA-256: 0ee756b7d4a016f64645f910ee8cf592f8006889312b5493a12696a80b78da95
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. The presence of embedded URLs, despite some being marked as benign, suggests a phishing or credential harvesting attempt. The PDF structure and embedded objects are consistent with malware delivery, likely through a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9444

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/razvivatel/yapz/~3/UZrB20b2Dcg/square?utm_term=chemistry+stoichiometry+problems
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e76ea3b00c897b56ee4b8c/1625779875214/94698171770.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8ecee1448b06198462fef/1625877742380/dewosilowerujojebugut.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8fa9bf229ba2ea8358530/1625881243185/the_framing_of_the_us_constitution_word_search_answers.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e90ff42c5c2f6215c85806/1625886708692/90824248381.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8fcc0e7a3c5fba3e7065/1626116044647/vudafabod.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8b53ebfade41bb316675a/1625863486403/10244524400.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e84005edd67e1f12d44977/1625833477586/tikilu.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e926d3b630645a0ef79144/1625892563913/the_night_circus_online.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_off00010c0f.bin
37c58724a80e7256786ffaf31b2a2d73459089084a9ab5fc911172afa0bbb59a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 10660 bytes
font_01_sfnt_off00012446.bin
32da8726c69c67016af3469f2e03a6efc81b8c61d967706a1b56638067d32e3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12446 17988 bytes
font_02_sfnt_off0001544b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1544B 16792 bytes

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