Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23450e9b0a5e9f4…

MALICIOUS

PDF

78.1 KB Created: 2021-07-12 22:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c79598e86123890533a83c37f8d43683 SHA-1: c360fe05d15c2ade80c4307d742b6ddaa2cf8dfb SHA-256: e23450e9b0a5e9f4bc88bd0a14a9c097c64981cb121006ba6064c1ecec8bb15d
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests a phishing or redirection attempt, likely to deliver a secondary payload or lead the user to a malicious site. The file's structure also shows duplicate object bodies, which can sometimes be used to obfuscate malicious content.

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/eaN1Eb74jJI/square?utm_term=compare+relative+and+absolute+dating
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9213cb132fa3620738884/1625891132413/73628544005.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92dfdaa30721e65efa3a9/1625894397227/hoopa_and_the_clash_of_ages_full_movie.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7984c268f363b085c13a/1626110340426/ramovalorore.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e828e16e46386ca3c3cf23/1625827553244/normal_head_circumference_for_5_month_old.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec92f1478ebe26bfc6c7e3/1626116849529/another_word_for_tremendous.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d0f1e2705b436309626d/1625870577488/how_to_draw_a_small_giraffe.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_off0000d1a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A3 16792 bytes
font_01_sfnt_off0000e9ba.bin
ac07d46480c891999061f75eaa54c6bbacbca8fef96b884d7911036e26daad9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BA 11072 bytes
font_02_sfnt_off00010314.bin
b1654ef99b7d213a7efe2d813600717e0e47a57a7872a4dfc774c2a224fa046e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10314 16128 bytes

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