Malicious PDF — malware analysis report

Static analysis result for SHA-256 86fc5ecd06b86491…

MALICIOUS

PDF

75.3 KB Created: 2021-07-13 06:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bae006c0a0057b748bc34f6c2daa0755 SHA-1: be2d8c656bee185a75719749b8fef517ef5c7420 SHA-256: 86fc5ecd06b864917fa034e4090fd1950c20f9d6de21f06982ef108b1c8e39bb
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 high likelihood of malicious intent. An external URI was found embedded within the PDF, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common attack vector for delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8028

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=find+the+value+of+tan+840
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7df5a872c4c6263c504d5/1625808730412/65562043429.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ecf833f8b4e244e4f8cc92/1626142771612/michael_buble_fly_me_to_the_moon_lyrics.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eca16f3631fd4ab8191004/1626120559097/gizen.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_off0000c2d5.bin
fbea9ed873044042cd197d6d8e5d7d4905297bcbce03099f86ce3d6fb2251217		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D5 10736 bytes
font_01_sfnt_off0000db69.bin
bfa042f8d6b11f031c79acbc3be508e505421aed090a47092918d04057a7a553		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB69 17436 bytes
font_02_sfnt_off00010986.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 16792 bytes

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