Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e2baf2517139dc…

MALICIOUS

PDF

75.9 KB Created: 2021-07-16 02:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe75ba4ce8f0e1f7bab082ac492c84bf SHA-1: d7cb3cc3d0cdbd2d1ebd884d4cd8f0eed05f011e SHA-256: 90e2baf2517139dc76a4b057e875d2b6cc0072afb09a76ed1b15aff08d486309
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The PDF contains embedded URLs that likely lead to malicious content or further phishing stages. Although the document body is heavily obfuscated, the presence of embedded URLs and the overall detection suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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/sq/ugae/~3/k6oGaauGqGM/square?utm_term=kylie+and+baby
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e78e1bba333063f173aa63/1625787931697/question_tag_questions_with_answers.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8890700aa07a78956a7b/1626114192609/king_edward_of_wessex.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e78b4769e16759cf710e81/1625787207838/29049111425.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_off0000ccfe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFE 16792 bytes
font_01_sfnt_off0000e510.bin
e979651ddb2f7cee7878d8c3882febb6a1efe71dee2c9842e5e3ab20f2240746		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE510 16048 bytes
font_02_sfnt_off00010e61.bin
8ac4add7ef76f1a27f4b891e568b42bddc9fad3c3c14a64e95bef5344818f93e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E61 10000 bytes

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