Malicious PDF — malware analysis report

Static analysis result for SHA-256 1186844484bd3ed4…

MALICIOUS

PDF

75.2 KB Created: 2021-07-13 22:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2333fe9abd3c9cdfd02dc477bff04c7 SHA-1: 810acd09464a667c4d00f0fe5c23bce2c410d6a3 SHA-256: 1186844484bd3ed498b732f2bd888c0bcacf061351672cbe11e42f8696feecb0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URLs, although some are marked as benign, suggest an attempt to direct the user to external resources, potentially for downloading malware or phishing. The PDF structure itself contains indicators of malicious activity, such as duplicate object bodies, which can be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7746

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/EjZ5HCEZs_A/square?utm_term=army+bus+game+download+apk
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7c38f89f8e700bf6aabc/1626111032767/a_state_of_matter_which_has_neither_definite_shape_nor_definite_volume.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edae845dd1eb1c29084b3f/1626189444712/minecraft_for_pc_download_windows_7.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed9128fb5306426ed0ca46/1626181928365/83193382662.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e91c7a5ebba154a8fc29c0/1625889915019/how_to_make_someone_think_about_you_without_talking_to_them.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_off0000c4e8.bin
fa2663e7f99da5d1faaf138475d2de7d8418f42d2295753f04f559d1b0a6071a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E8 11056 bytes
font_01_sfnt_off0000de4d.bin
fbb6883595c9ba28277383763a2754296a76f1e828026619b11af6eddf9c2f72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4D 16440 bytes
font_02_sfnt_off0001093e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1093E 16792 bytes

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