Malicious PDF — malware analysis report

Static analysis result for SHA-256 5710a6877bf2a2ee…

MALICIOUS

PDF

76.2 KB Created: 2021-07-14 08:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 827a8eed3b0e6c93670ff019b324ca00 SHA-1: 9dd40d3463c9dab8091cfb89868704873b8e97a1 SHA-256: 5710a6877bf2a2ee82fab206a52f055f3c19b9b08adc9c166092d9813ff8e64f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The ML classifier also indicated a high probability of maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection profile suggest it is designed to lure users into malicious content, likely for phishing purposes. The file's structure and detection by ClamAV point towards a phishing attack delivered as a document attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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/v-xubMviL4Y/square?utm_term=best+colleges+for+marketing
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed8e31f8b4e244e400394b/1626181169295/20323110095.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edf911a50f6e33a3274940/1626208529451/97170774470.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee208cf72ce0266e0daec4/1626218636601/mamulupujem.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_off0000caba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCABA 16792 bytes
font_01_sfnt_off0000e2cc.bin
72e5e461db8a5da8a05adbc945cc2720d350b21839aa82a74f61d2d82e9bb09a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 16160 bytes
font_02_sfnt_off00010c83.bin
43f9f7689f6276dd0cf11e677ee74897e22f8629a0e2cc9017a36b5864166dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C83 10824 bytes

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