Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c904ea2fe93f77…

MALICIOUS

PDF

88.9 KB Created: 2021-07-15 09:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52aec8f5c398af25e825af824908570e SHA-1: 9fce359d50542ee2039c0871354bc07156ea4a5c SHA-256: 15c904ea2fe93f77f4626bf32cff8cee53849345b35288d14528780e8939a773
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. The presence of embedded URLs, even if some are marked as benign, suggests a phishing or redirection attempt. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier clean score 0.1448

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/UQ8tT55rDuk/square?utm_term=good+morning+2021+images+with+quotes
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee66957dee9f188f7aff7a/1626236565232/53637064236.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e946d11448b0619849956b/1625900754049/how_many_calories_in_1_ounce_vodka.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_off0000fad7.bin
b47f5bc6148971494618dc2db05e00f36dad36bddd2497721f5b4f0b655e930a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 11312 bytes
font_01_sfnt_off000114ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114EE 16792 bytes
font_02_sfnt_off00012d00.bin
56987d8cccdbcf95e6255d594201b0cd1c6b6e01f8c48115d4c0d2b0cc25eb83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D00 16644 bytes

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