Malicious PDF — malware analysis report

Static analysis result for SHA-256 7666733dc55a6034…

MALICIOUS

PDF

80.6 KB Created: 2021-07-17 05:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: afe9e47da0b793c9eb1ce6a6e2f2bc9b SHA-1: eddfdc3f9c98d756b7421528c9dc24f37b66e3b8 SHA-256: 7666733dc55a60347fc7075cdd5623efa29870dbba2012efcb9ac401b0cf91b0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests the document is designed to redirect the user to external resources, likely for payload delivery or phishing. No scripts were extracted, but the PDF structure and heuristic firings point towards an exploit attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8740

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/v-xubMviL4Y/square?utm_term=more+than+ogive
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d31ee2705b43630986d1/1625871134386/lofafona.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edbc65723c4d01406f8114/1626192997739/komixebe.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec71adfe0477279409b0d9/1626108333793/westbrook_manor_apartments.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efe6a71e1a563dfb8cd292/1626334887634/3495687703.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8310e7e45264421fc1e0b/1625829646612/rudonaji.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0c216625deb1216898a77/1626391062883/assigned_crossword_clue_8_letters.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_off0000db37.bin
2fafd06b476b6ee3af6c3c72f899fcebdf361fa336905b219d3ea3d7c38826ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB37 16564 bytes
font_01_sfnt_off0001066d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1066D 16792 bytes
font_02_sfnt_off00011e84.bin
371a33a18ecde468283d6c03502ecce37ab63658f3ac6222749323324e57fce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E84 10232 bytes

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