Malicious PDF — malware analysis report

Static analysis result for SHA-256 74259bf38c25c017…

MALICIOUS

PDF

87.8 KB Created: 2021-07-20 16:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb2c167c14dce3861fb32de4972fdd47 SHA-1: e221bd9b28bb59df6a569c2968e7db4887fcfcbc SHA-256: 74259bf38c25c017710d64e5cc6c7ddd93ee93e25427741e85b4c52ebeef521a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded URL that points to a suspicious domain, identified by heuristics as a potential phishing or malicious site. ClamAV also detected the file as a 'Pdf.Phishing.Trojan'. The presence of this URL suggests an attempt to redirect the user to a malicious resource, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5959

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://philabc.ru/square?utm_term=under+the+belt+meaning
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f577229ee5897bffbb8f1e/1626699555028/i_will_always_write_back_quotes_with_page_numbers.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7cc86efb14d1122109b5b/1625803911153/paluwikojoritevavigadone.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f59d6301d75d08bd60d8bf/1626709347889/chemistry_of_the_elements.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e916a30cbdad4d350569c2/1625888419277/unit_5_homework_1_monomials_and_polynomials_answers.pdf
    • http://www.osha.gov/
    • 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_off0000f826.bin
70562099ba02621300439e2c14fb04db9b3431261b300cbd3aeeaa16e36efbde		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF826 10552 bytes
font_01_sfnt_off00010fb0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB0 16792 bytes
font_02_sfnt_off000127c2.bin
37922b928a34e1520b5a481f48094bf1732634974e1e1f2b0df953db4e03b316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127C2 16792 bytes

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