Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6480a5f417f630…

MALICIOUS

PDF

77.2 KB Created: 2021-07-15 18:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ca25cb1270bddad92dbf22aa983f9958 SHA-1: f32542452112f3bbcc007c5d3f80376b0244d303 SHA-256: eb6480a5f417f6306c6f3596b85163558eaa51bd4fecd9637576e44450c72ec0
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 presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to external resources. While no scripts were explicitly extracted, the PDF format itself can contain JavaScript, which is often used to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/AG-UZpNbJGc/square?utm_term=english+sample+paper+class+10+2020+cbse+with+solution+pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edc5344485e42169ff255d/1626195253218/24179810470.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee39bc86aa876280bc69fb/1626225084489/hive_is_not_null.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec780a82b4c978cf4062bd/1626109962712/netefelaravipodorisolov.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edf40abf52576c62495f31/1626207243054/a_command_economy_answers_the_question_of_what_to_produce_by.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_off0000c87f.bin
81198846550548c1a7eb845274992fba5cbfe37665db0bea1c387028f209d648		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC87F 11668 bytes
font_01_sfnt_off0000e3c5.bin
b28a7cc56de7a8754df9d975ecab2fe3e457e72245863db0942ddb0002b92dea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C5 17080 bytes
font_02_sfnt_off00011076.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11076 16792 bytes

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