Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4fcfacf3a55f27…

MALICIOUS

PDF

67.1 KB Created: 2021-07-12 20:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 599e04604f761acd685be0c58af2aa52 SHA-1: 98fbdbc92790b1ba6b435b03073a98cfb20db97f SHA-256: fb4fcfacf3a55f275bb76cf062bdef76864ab97cbd3c36ed78f9a18e8b899b06
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URI that points to a URL, likely intended to trick the user into visiting a malicious site. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing attack. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to deliver a phishing lure, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier clean score 0.2353

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/qI_NY8u86tA/square?utm_term=invitation+for+debut+template
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e944c9c14ff043cd5e00ab/1625900233848/79981482706.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_off0000abfb.bin
461f10973269f5f9306fa4ab93577d2f9c10c8355bccb75153f2bdf3f8c7419a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABFB 14564 bytes
font_01_sfnt_off0000d04e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD04E 16792 bytes
font_02_sfnt_off0000e865.bin
ce9aa0745f2b09c77ff9aea68e4fb974d6d6ceb2291ce8b3db9559ee105fa90c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE865 10748 bytes

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