Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3530b9ea75a997a…

MALICIOUS

PDF

77.9 KB Created: 2021-07-18 16:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 45359f2822868c25f7c0ec4e77973312 SHA-1: 619646d605eb5863c0d727a03991fb680057f70b SHA-256: b3530b9ea75a997ac2bcaf8e0dac40c6651e412b3363b13eee54ff23850de5f6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The PDF contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/UZrB20b2Dcg/square?utm_term=what+are+the+advantages+of+being+a+public+limited+company
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f08ef9a4dec779154c31ce/1626377977957/91562347464.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eda0fa3680ef421b55091e/1626185978815/79765529140.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f039d798ba4d74611a8e33/1626356183683/86369533962.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8ea8973f9128ac6ba980/1626115752256/fully_equipped_meaning.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f06ae5d54ecf6408d7c388/1626368741987/xosafikemed.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e916830cbdad4d3505677a/1625888387308/how_to_apply_for_unemployment_as_self_employed.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee57ad2d09e34b72a1e4f3/1626232749342/how_to_hack_screen_time_password_ios_12.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_off0000cc4a.bin
cb9d2dcbaf2bf3a5ccc5e85bcfc19323a505de7c9b7426046fb7cb72a6494f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4A 16852 bytes
font_01_sfnt_off0000f873.bin
629d98f9ab56c5571c4acefc670f809c0f3876bfc09f0ebe05b4f34d04618775		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF873 11480 bytes
font_02_sfnt_off00011308.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11308 16792 bytes

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