Malicious PDF — malware analysis report

Static analysis result for SHA-256 27dd54aac6c3574a…

MALICIOUS

PDF

75.8 KB Created: 2021-07-12 23:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1f6d3fb5f00ce4cf7bf138c7de141549 SHA-1: 930db23722fd9be3bd2761cbc4335a5105cedc1c SHA-256: 27dd54aac6c3574a0caed6bff490d262f750a3d23909f00d1f00d3bcee74c08e
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. The document body, though heavily obfuscated, contains references to 'physical education book for class 11 pdf' and includes a URL that appears to be a lure. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.1751

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/u8n3KCQdUYc/square?utm_term=physical+education+book+for+class+11+pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e943d0f492d21a0f6bebb8/1625899984396/sokinuguzujobi.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_off0000c4c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C1 16792 bytes
font_01_sfnt_off0000dcd3.bin
95e5de97ee70f9c594566be1164763ba34f8ed9733fac40eca832a27e833918b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD3 17096 bytes
font_02_sfnt_off0001098b.bin
bf5c78b9c9c966612f8f16847b6ca7ebb5468a41cdf8323ae87a0b0cd0218d05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098B 11216 bytes

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