Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a3ca69479c0469…

MALICIOUS

PDF

107.4 KB Created: 2021-07-15 19:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14672f71340dd1d9a5eff5eeebb9a028 SHA-1: df401143736a980aef4917c91bf56d7b28fbc7e7 SHA-256: d6a3ca69479c0469143f8f76d1a56a90834c680a8bfaf4a4c6637b3ec18fe690
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The primary IOC is the external URI, which likely leads to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5608

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://catamma.ru/square?utm_term=the+turn+of+the+screw+play
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efd4f7e9d3bc6103fbc130/1626330359872/most_of_the_human_neurons_are.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f028044980ba6b3b70acf4/1626351620167/83021111713.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eff615c0b35f4fb3da803a/1626338837729/classroom_case_study_examples.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_off00014250.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14250 16792 bytes
font_01_sfnt_off00015a62.bin
b13144868fc87498a0e2901d6709fc1c0c92d02c74b9fe8c44d8c1816ff70b3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A62 18124 bytes
font_02_sfnt_off00018957.bin
d69c68a7fd10ada944b3ec40b25c8d48736e100295111c747a2711237fdc556e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18957 10748 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.