Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff1660ab3da0c7b…

MALICIOUS

PDF

83.8 KB Created: 2021-07-17 18:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 047ae298c2e134c178ae89779cf87b03 SHA-1: 3be0c81ae2187d6cc2687117cec4816e3515c37a SHA-256: 8ff1660ab3da0c7b8338ab400fb932442ee8d98f0a186011f8a6603df5559747
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains an embedded URI pointing to a URL that, while flagged as benign in this context, is part of a pattern often used in phishing lures. The PDF structure and heuristics suggest it's designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8790

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/razvivatel/yapz/~3/gPkW7oTCsL0/square?utm_term=signs+of+pinworms+in+kids
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8e12f563c1506a8b2bc91/1625874735362/outfit_for_the_day.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e94cde18245d33f1831476/1625902302927/free_faux_leather_earring_svg.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec79cac8b0d544b6d6a41a/1626110410945/65277284301.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed6fe3fc46f1629a0568b3/1626173411424/70102019581.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7d0017d3b385c94b52309/1625804801562/bmi_normal_underweight_and_overweight.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1a340177559527f461fdd/1626448704472/52716962524.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee7dd5db6052518eca0d41/1626242517805/kogorovizabejesotonujij.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_off0000e708.bin
4f472aa3e3baddb77eafd83d72664616444dd65740fe9ca2cf85c6b8563bc981		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE708 10656 bytes
font_01_sfnt_off0000ff2e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2E 16792 bytes
font_02_sfnt_off00011740.bin
ab17977f5ac4731020f68c8e4c873a20c8fe9b26e6cb04bad5fa43c361cd34cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11740 16916 bytes

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