Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae83c98def64869…

MALICIOUS

PDF

80.0 KB Created: 2021-07-13 08:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a444768abc9bf71db1645854c3473502 SHA-1: a97b27b6ba2277da608b81b13750166bcff77dd1 SHA-256: 0ae83c98def64869468a6d1b69160cfd3713b95a894974fc6be4ad96557acbc4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that are designed to appear as legitimate document links, likely to deceive users into clicking them. While no scripts were explicitly extracted, the presence of embedded URLs and the detection as a phishing trojan suggest an attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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/rCno-htTzZk/square?utm_term=general+ship+knowledge+course+notes+pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8f94a83ae0c4902375008/1625880906777/the_mixed_strategy_game_can_be_solved_by.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e79a68d0799e4214bcd942/1625791081027/move_to_word_document.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90cd1e6bd1231e6072765/1625885906044/tozusolesesu.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_off0000d5d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D7 16792 bytes
font_01_sfnt_off0000edee.bin
83064e05a861a55fb6faf892e72802eaed92372ef6c470bada424d5f1938d4b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 11216 bytes
font_02_sfnt_off00010802.bin
2a7ad7b2fa852c8ee223dc5cfa04c40e51bd40233651d1060361b3c6e4472e03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10802 16904 bytes

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