Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f7744c0ec4b158…

MALICIOUS

PDF

80.2 KB Created: 2021-07-14 00:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91ede98647f6e0b5d0822ef0b722ab86 SHA-1: 10021273a514d04cf48296d02349a67ef86bb8b1 SHA-256: f0f7744c0ec4b1584aa840fd3d05707c2cfae40cfb76982692dde1f2d643a9bc
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a phishing trojan. It contains embedded URLs, one of which is part of a feedproxy service and another points to a PDF file on squarespace.com. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external links suggests an attempt to redirect the user to a malicious site or download further content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1467

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/X6hrLWyzjlw/square?utm_term=hunting+blind+chair+with+gun+rest
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec828f12c1416d2f1ac7de/1626112655202/find_the_equation_of_the_line_that_passes_through_the_points_calculator.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9316ec14ff043cd5d7273/1625895278445/7168796788.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_off0000d94c.bin
6de35fd8a41a944128c9ffbe19e0eecf71ee010c03186b29ae2a2b2b4acc2456		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 16656 bytes
font_01_sfnt_off00010456.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10456 16792 bytes
font_02_sfnt_off00011c6d.bin
3488afb3c1e42591f31cf87223275459c88fab2edf216b604862078ab78c4cfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6D 10848 bytes

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