Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c8e5be3ec4d72a…

MALICIOUS

PDF

76.4 KB Created: 2021-07-12 20:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 614106d3831dd2dc5d1441ad7c546606 SHA-1: 3033f668be6a70ecbcbba17fd587f77f9da53af8 SHA-256: 08c8e5be3ec4d72a0f946cddd64e9599fb004a3674e72d9c7af2dfcf41278c58
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. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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/gOBB6uaVNRA/square?utm_term=how+to+cite+an+essay+in+a+book+chicago
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e88dfb05fb547c5b90d481/1625853435326/xivikadaboda.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e841a402850865eb89bf68/1625833893113/16017419731.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e86e4d65512e62108daa21/1625845325438/the_first_five_years_of_marriage.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_off0000c9a5.bin
d527c28332431ac42df90550446429ce2d3da6f47ec14e9578895dfa05e08337		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A5 16920 bytes
font_01_sfnt_off0000f4f0.bin
e7e284442e34d0ba0c196e6465c59fb917108c0c2624fb750ca702082439cc86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F0 10784 bytes
font_02_sfnt_off00010dce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCE 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.