Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a7a5b62d24be7b…

MALICIOUS

PDF

78.3 KB Created: 2021-07-16 10:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e399a75b4ba6189db5f84a6105c9b187 SHA-1: 5f52cc26956cbc5dbb289866efae97dc8802f47f SHA-256: 33a7a5b62d24be7b540ceba0f1cdcc20e88b73f43890b9f238ad606c61e8a2c4
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URL that, when clicked, leads to a Google feedproxy URL which in turn redirects to a Squarespace page. The ClamAV heuristic identifies this as 'Pdf.Phishing.Trojan', suggesting a phishing or scam intent. While no scripts were extracted, the presence of the embedded URL and the ClamAV detection strongly indicate a malicious purpose, likely to direct the user to a fraudulent site.

Machine Learning

  • Nyx PDF Classifier clean score 0.1454

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/-7-cX3opz_8/square?utm_term=slogan+about+respect
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edc5bd1c6c1a61d5228280/1626195390305/49306730090.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f078029383a81116925947/1626372098357/mulumathy_song_download_in_tamil.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_off0000d2ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AB 16792 bytes
font_01_sfnt_off0000eabd.bin
80cc5cf8b2946540938797d45c7b1c3bf46d7da72e37e42be966df0ee389e1ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEABD 16356 bytes
font_02_sfnt_off000114f0.bin
bb1c7a595da65078a5d4cd4c06706c1a24a526e07cfa7deb68839592647a9c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114F0 10772 bytes

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