Malicious PDF — malware analysis report

Static analysis result for SHA-256 925364d204b7dae0…

MALICIOUS

PDF

85.1 KB Created: 2021-07-13 16:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad156074f125702fe188f9b454428c46 SHA-1: b5c9030d277cfce0eed0a1f72978056688a90c47 SHA-256: 925364d204b7dae01d8f69326e10db09b30fbc0c961ac0c2d26d52b6aab11620
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, even if some are confirmed benign, suggests an attempt to lure the user to external resources. The file's structure and heuristic firings point towards a phishing or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8083

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/IdU8rIDf9lQ/square?utm_term=allosteric+enzyme+pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e935c08fb24157da70c18b/1625896384323/anxiety_hierarchy.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed23900124a666ff40c66b/1626153872325/15290440573.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eca8ef80388a1034da9f8d/1626122479590/life_after_birth.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e79f3269e16759cf727152/1625792306705/madofikagizajasutewixufu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e76a470439116319b1a7aa/1625778759238/expression_of_interest_letter_sample_for_business_contract.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_off0000e997.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE997 16792 bytes
font_01_sfnt_off000101a9.bin
6f11b2d63a69b8613ec597bbc08dee01f6e369b3cd4b4ab614e0fd1aaaba3097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A9 17496 bytes
font_02_sfnt_off00012ff8.bin
bbb2a24c8dae5ce048744442add8b8b043457b8a92a9b7d41cb7c9dd39283b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF8 10776 bytes

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