Malicious PDF — malware analysis report

Static analysis result for SHA-256 867097b1efee4303…

MALICIOUS

PDF

82.8 KB Created: 2021-07-16 04:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e98fadc4b9e41bd342dea6800fdbb9b9 SHA-1: 93b298490e3d5c5b517921136633ddb40babcad7 SHA-256: 867097b1efee430398713d0dc73f894211e71822195f46045c7f399eb8ffa257
66 Risk Score

Malware Insights

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

The ClamAV heuristic 'Pdf.Phishing.Trojan-d2528dad23a95d95-10044376-0' strongly suggests a phishing or trojanized PDF. The presence of an embedded URL, even if currently flagged as benign, is a common tactic for phishing lures. The PDF structure itself shows signs of manipulation with duplicate object bodies, indicating a potential exploit or obfuscation technique.

Machine Learning

  • Nyx PDF Classifier clean score 0.1542

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/sq/ugae/~3/4Ji06Fp1PxY/square?utm_term=overrides+in+tagalog
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e773380a0d2c023bdbcb7a/1625781048471/58849092930.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee4b24b1f8b9564886ad34/1626229540342/29661148267.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_off0000df1a.bin
2d661d6dc46aa9851601bf396c7c3acc86aadb2c238c6b5daa2c0442b9a0ce4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1A 18648 bytes
font_01_sfnt_off00010fd5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD5 16792 bytes
font_02_sfnt_off000127ec.bin
c0ef8e149667e99ccc513f1163062848f7e5de682294c3a71eb7da2f8afbabb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127EC 10512 bytes

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