Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8ad57e90801bfe2…

MALICIOUS

PDF

101.9 KB Created: 2021-07-18 18:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5740d8b6b866fbb1031b3466fd26f6f7 SHA-1: a5b8b41fe2e576e7e2e3383469f4f71e8dfa301a SHA-256: b8ad57e90801bfe2f27c33f1d380ba8195256bfcdb483d8a46a16920f833b65d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URI points to a resource that likely serves as a lure, attempting to trick users into downloading further malicious content. While no scripts were directly extracted, the PDF structure and embedded URIs suggest a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7925

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/AG-UZpNbJGc/square?utm_term=organizational+development+french+and+bell+6th+edition+pdf+free+download
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee062dc450ee47308347e4/1626211885880/mamas_baby_papas_maybe_an_american_grammar_book_summary.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8e633631fd4ab816ec06/1626115683667/impact_of_unemployment_on_economic_growth.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f35c3cbb7e64222df92638/1626561596527/89195107581.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee5ba827fa864c7d13a152/1626233768928/pdf_to_any_converter.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e940a5f492d21a0f6bd428/1625899173456/things_that_start_with_c_preschool.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_off000128f0.bin
9adc296f37e58423a5179308d77ad52cf83e28cbe0658226beac4ec3e6cdf0ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128F0 11444 bytes
font_01_sfnt_off0001436d.bin
28a1b82f4cd44461fa930735b15ce404bf6de10e268e91e6612ae3cbc4f6df64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1436D 17336 bytes
font_02_sfnt_off000170ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x170BA 16792 bytes

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