Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b88be2e10384d4…

MALICIOUS

PDF

81.5 KB Created: 2021-07-15 19:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e84a8a9db7198ae8022f01e0497446a3 SHA-1: f3b1051f2571437ce135046f4ab7e014c964dfe8 SHA-256: e3b88be2e10384d4069ea3cbcd43a88ac56234f9d774ec51fc1673169773d2fc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, with a high risk score. The presence of embedded URLs suggests a phishing attempt or a lure to a malicious site. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to exploit vulnerabilities or trick the user into performing a malicious action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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/~3/1LSSs5qy-i4/square?utm_term=post+appendectomy+complications
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec983ec32416487af155e2/1626118206264/fuzifuzezetug.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edd4cc895aae42f6593a8a/1626199244609/how_do_i_get_a_new_id_if_i_lost_mine.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e925de309bd63f3d862c29/1625892318569/goal_in_management.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee833c115d504d3a8a4d2d/1626243901063/26275423219.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7c521dbc52028c83e69dc/1625802017857/crosstown_doughnuts_piccadilly.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_off0000de7e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7E 16792 bytes
font_01_sfnt_off0000f690.bin
df53766a36edbfd1912cbbcdb2ce22776547cf51ae1bdaabbf681596074759cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 16580 bytes
font_02_sfnt_off000121a0.bin
71ff8025a267e90337dc147995b2794a80a246997356efdd791c5804018a15fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121A0 10692 bytes

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