Malicious PDF — malware analysis report

Static analysis result for SHA-256 7866650d2ceed87b…

MALICIOUS

PDF

90.0 KB Created: 2021-07-16 11:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 72a35cfc32df848c27a7cba95007269d SHA-1: 2773395172fe33904ab0c36c893033a2fc1e96d0 SHA-256: 7866650d2ceed87b3e4ace80c25f8dd35287202e730e254009ce2ad155734fb7
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains embedded URLs that likely lead to the download of a secondary malicious payload. The presence of these external links and the overall detection suggest an attempt to lure the user into executing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8322

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/um1bUVUAM38/square?utm_term=song+of+songs+7
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f071120fcd175c5035b5da/1626370322780/pajimigop.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee609d7dee9f188f7ab881/1626235037264/bible_verse_about_letting_your_light_shine.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e939a11448b06198493cfa/1625897377278/average_cost_of_chrome_plating.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f03da44063550b157fa38f/1626357156601/70324531883.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8f95db132fa3620718f23/1625880925716/kendall_jenner_now.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f002b8d052060b21f70795/1626342072873/kaxigumi.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_off000101af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101AF 16792 bytes
font_01_sfnt_off000119c5.bin
d66fceac26267291528d185c66168c86470f008838be2c88567ee88594531e61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119C5 9884 bytes
font_02_sfnt_off00012fae.bin
bc304dc373ef4b80060f80e30c63fd90f947b6896ef027fe5c756bf5ab497234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAE 17088 bytes

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