Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7cfbf654edd8bcf…

MALICIOUS

PDF

74.4 KB Created: 2021-07-12 21:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0659e9d5da6392e820e16e1c781bc2de SHA-1: 6ca5ded534906503f621302b87a7a2bce0cde997 SHA-256: b7cfbf654edd8bcf7108e427d6f6b4fba07a62b9ee5ca62dbb60d0c6430b8c8f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains embedded URLs, suggesting a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the nature of the detection and the presence of URLs indicate a likely attempt to redirect the user to a malicious site, possibly through embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8802

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/nCRFBnYrBHY/square?utm_term=how+to+train+a+pteranodon+ark
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8e54b8fb24157da6d0d67/1625875787986/3603374990.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e85b99857426732ba18080/1625840537739/72020517293.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec86782de985067773dcb9/1626113656859/the_derivative_of_cosec_x_is.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec841a3a853d606aec9d78/1626113050418/rubric_for_science_project_model.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e9426166be7e490f10b675/1625899617877/muet_listening_question_and_answer.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_off0000c0d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D0 16792 bytes
font_01_sfnt_off0000d8e2.bin
8f4c729208ab48fe6471bc639c989c4ea28855b41618ac42dd980580a75565ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E2 17348 bytes
font_02_sfnt_off0001050e.bin
49146f0e997243c950c4293e197479d8d7b426a0d8025a5b9e6306076c203ddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1050E 10340 bytes

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