Malicious PDF — malware analysis report

Static analysis result for SHA-256 d729c4908b5423ca…

MALICIOUS

PDF

74.8 KB Created: 2021-07-19 17:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0bb563ecdb608707583561c5b00124f SHA-1: fe1244fa8dec694951c140f25ee4ff736a2b0e74 SHA-256: d729c4908b5423ca724cb984a2b065a8c94321db7aac10e990431af8eb2c378c
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. It contains embedded URLs, one of which is associated with phishing lures. The PDF structure also shows duplicate object bodies, which can be indicative of obfuscation or exploitation attempts. While no scripts were extracted, the combination of ClamAV detection and embedded URLs suggests a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3002

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/ZV5PD9BTPXI/square?utm_term=sexing+baby+rabbits
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed4c754182611181b4d60b/1626164341251/61586279956.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee8a0fbb85ab7f02c0fd6d/1626245647409/cp3_and_rondo.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_off0000c52e.bin
dab42df60cb245c9709cabee0efd9277765c7e0bda1b2c8d1652bad50845416e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC52E 15840 bytes
font_01_sfnt_off0000ee18.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 16792 bytes
font_02_sfnt_off0001062f.bin
7871a061465f609de01606eae2066a1efbf22d6bf586bab477a5061832ffba47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 10548 bytes

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