Malicious PDF — malware analysis report

Static analysis result for SHA-256 96dd888cb0a32418…

MALICIOUS

PDF

80.1 KB Created: 2021-07-16 14:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8715d7d982aaa05b43377d7bf3d9b003 SHA-1: f2063efb0e5ab76bad41bdd47deb6a0951068b1e SHA-256: 96dd888cb0a32418d6b4cb82b29fd54147cac3f6b4f83ce7421866011861aeb6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests a potential phishing or credential harvesting attempt. The PDF structure and embedded objects are consistent with malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8584

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/~3/5JeRQhMeIYg/square?utm_term=audit+multiple+choice+questions+and+answers
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0c8b59392da325e916b59/1626392757603/grey_and_red_combination.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e856de700af648fd1191a7/1625839326624/seletarudawo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e779681643e268622ddaee/1625782632264/cod_cold_war_season_2_weapons.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eca2527dc7460dd09dc7f4/1626120786523/67059822368.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ecf6708c96c6301f8ecc4b/1626142320506/namazekad.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efcac3d77757041651760e/1626327747839/youth_group_names_in_telugu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0f606347a2e2c84fd29e6/1626404358779/8545752078.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_off0000d501.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD501 16792 bytes
font_01_sfnt_off0000ed13.bin
9c8b289f52fe300a2ba6226f401b5bfe0b719e7162a7f244fe0dac6b648c1fe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 16972 bytes
font_02_sfnt_off00011921.bin
87add2a5093eee632423754a54640865fd13eec4e92b51dd4c05dc1db10fcb9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11921 11092 bytes

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