Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9be3f5e0cd0956…

MALICIOUS

PDF

79.5 KB Created: 2021-07-15 14:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9eb92e815cc1e6871c129d879c85e8c9 SHA-1: 9dee47a6db5bd199349c2f7ac602a01a50523283 SHA-256: 9e9be3f5e0cd09568a4317662050a08e14d5d68395bae22916f9cc0a95d73220
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as a phishing trojan. It contains multiple embedded URLs, some of which are associated with legitimate content, but the overall detection suggests malicious intent. The file's structure also indicates duplicate object bodies, a common obfuscation technique in malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6198

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/~3/7R6buoffwiA/square?utm_term=average+cost+to+bulletproof+6.0
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee5b527c5bce1f334f0ce5/1626233682332/sarcoptic_scabies_in_humans.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec880c5c244202458bd1db/1626114060127/pre_and_postprandial_glucose_levels.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efefc33a4e3014a1c22a7e/1626337219367/edge_of_tomorrow_full_movie_watch_online_with_english_subtitles.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_off0000d2df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DF 16792 bytes
font_01_sfnt_off0000eaf1.bin
fd7d7a8097773cc8f5bbf30320f6a75b661075ef779f65af504ffc1c45ba5161		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF1 17232 bytes
font_02_sfnt_off0001182d.bin
332f22399e767a2eb66c6974e57765687042c7e8c7364dcd5c918ee764dc211b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1182D 11104 bytes

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