Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c54e96b2106b0ea…

MALICIOUS

PDF

74.4 KB Created: 2021-07-14 05:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef9639427e219517971b0e501f7cf04b SHA-1: 4b7b616e65b0b699c0d82eafb753048c309fd62b SHA-256: 8c54e96b2106b0eafc08ec15bfd79ead4c78838f917756feb3cfa598ed17f261
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it contains malicious content. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites or download further payloads. The file's structure and heuristics point towards a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6911

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/UQ8tT55rDuk/square?utm_term=bootstrap+4+quiz+template+free
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec789ac217102653d50614/1626110106667/kamozizugaxug.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e926b3e370ac632289276e/1625892531173/12920123985.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7a787726b430b4673f22/1626110585075/setw_in_c.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee0379017ec663b5407b00/1626211193193/should_book_titles_be_italicized_or_underlined.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_off0000c056.bin
66cf2ffa568124fd1325742da6a7ad38b5fb590043e421f3be6d9b915d8cce15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC056 16944 bytes
font_01_sfnt_off0000eca5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 16792 bytes
font_02_sfnt_off000104bc.bin
3c44063f5b853c41d7d5dac3a74ee6c1b51ca347077c2424d2e17555d2bf013e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 10852 bytes

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