Malicious PDF — malware analysis report

Static analysis result for SHA-256 465167c14a5ebda9…

MALICIOUS

PDF

80.1 KB Created: 2021-07-20 01:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 509662a5dfbd238e00adee367b418d8d SHA-1: c54c8ae0a40c976532eac1ae8e6e2a2c6c850d0b SHA-256: 465167c14a5ebda9d83bfcadddc614c2e1044e13a59413e488f01fd22d504cee
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect users to potentially harmful content. The obfuscated document body and the use of wkhtmltopdf indicate a crafted malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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/razvivatel/yapz/~3/AG-UZpNbJGc/square?utm_term=the+sims+4+apk+android+no+verification
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f035fd34f25751eec5067b/1626355197341/production_timeline_template_excel.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f592f7e9756f21e83cb78d/1626706679892/wow_classic_rogue_pvp_build.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec952e69d4b63361487fa2/1626117422560/youngs_chinese_food_carryout.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2cf98cba7b71501e093ad/1626525592975/23045687584.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f5fbf08fc4c35b1f21d3ca/1626733552285/find_all_values_of_x_satisfying_the_given_conditions.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_off0000d7c8.bin
01e5bfd7070ff4a3a5213609757fc5b42208eaaa57f4e8ea70e243752d9fba98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C8 16660 bytes
font_01_sfnt_off000102c4.bin
40bd206bd5955ed2a3ad2698016e83953e97d19e05385b765691648a78903060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C4 11040 bytes
font_02_sfnt_off00011c5e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5E 16792 bytes

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