Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7693cc56e296bb4…

MALICIOUS

PDF

77.5 KB Created: 2021-07-13 18:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cd4a0ae0ff384abe59279b664ded281 SHA-1: 191f6b1ae4490c336c8365fc90645568ca5d2e9b SHA-256: e7693cc56e296bb47120a0cc4aae9ee103be4648f89b9ee60adcfa5570a9cf7c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file 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 redirection mechanism. The PDF structure and embedded artifacts, combined with the heuristic firings, point towards a common attack pattern for malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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/CHqDoFjlE84/square?utm_term=at+world%27s+end+love+theme
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8b2cfa40056e74d30979/1626114860198/drawing_4_summer_outfits.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7c6d96e46386ca3bf95a6/1625802457422/fate_extella_link_mobile_apk.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecb75ec4d2886679e3ceec/1626126174690/suxugadix.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_off0000d15c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD15C 16792 bytes
font_01_sfnt_off0000e96e.bin
a349fe40150759e7e94e34a4ff6df6a123979b9caf8b89bdd96d21d02088924c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 16072 bytes
font_02_sfnt_off000112f1.bin
fa72795f158f465b8638bb0bc5a5577d75da4298eab8b4617672e2ddb9aed0eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112F1 10428 bytes

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