Malicious PDF — malware analysis report

Static analysis result for SHA-256 996dfca4e191bb4d…

MALICIOUS

PDF

74.0 KB Created: 2021-07-13 18:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bfda54c1da68266865ea51b0234f12c4 SHA-1: 2b6cfaf6b269ce616621606d5477d6110cc875dd SHA-256: 996dfca4e191bb4d2775260e2088897ccc827a157a2ea3bc0837f2913357b26a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The embedded URL, while flagged as benign, suggests a potential lure. The PDF structure and embedded artifacts do not provide further specific indicators of malicious behavior beyond the general detection. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7078

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/UZrB20b2Dcg/square?utm_term=over+video+call
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec93f34f558d0bf39d2603/1626117107752/kemonirotosafadegasa.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e96024f4fe78435a3c7867/1625907236289/zukitowozof.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed982ecd0cb17c762e3feb/1626183726166/tasotusepo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec917dc81c37306b2fca10/1626116477593/c_for_machine_learning.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_off0000c263.bin
b21bd3993f93cc595dcc5fb65a2fff456e4d9195c48e20a8fcbf98afe358b000		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC263 10084 bytes
font_01_sfnt_off0000d8ee.bin
5c46a583f1fa738b6ef9272f2b5cef782b21fa0f1e329a217db99e07fa53c051		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EE 16280 bytes
font_02_sfnt_off00010327.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10327 16792 bytes

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