Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9298554ec648804…

MALICIOUS

PDF

79.7 KB Created: 2021-07-16 03:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d5782ccd67c7244bf39eb80c1add071 SHA-1: a111c4d63b0cfb7d77901a1a0c1dda37554f1771 SHA-256: a9298554ec64880470b3eeffc3b894f7c6de02a729e55cafd4734612cb560263
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded URLs, suggesting it may be used for phishing or to redirect users to malicious sites. Although no scripts were explicitly extracted, the nature of the detection and embedded URLs points towards an attempt to exploit users, likely via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8374

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/razvivatel/yapz/~3/4Ji06Fp1PxY/square?utm_term=cat+eyebrow+whiskers
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f05c05958453462bd6ce14/1626364934041/nikipiwisifajujo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee04487979814f85ac36c4/1626211400642/guilty_conscious_quotes.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7e62f1d61f435cef86306/1625810479678/lexiliwivinigekimujusawi.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed976b5860d606f481dc93/1626183531727/23097888492.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7b8ec7e45264421f6f2b3/1625798892496/antoinette_and_dingdong.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_off0000d69c.bin
4e41b06af7cfa191100fe082279594e8dd578bd47e439fb0c232e6f866cfef76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD69C 17052 bytes
font_01_sfnt_off00010327.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10327 16792 bytes
font_02_sfnt_off00011b3e.bin
25bacb34d5782154850ea9ced3b50d7dc15443fd98846832b53fb4e018342d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3E 10516 bytes

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