Malicious PDF — malware analysis report

Static analysis result for SHA-256 50cdfea70028d24e…

MALICIOUS

PDF

75.1 KB Created: 2021-07-13 00:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9bbb7a6bce32b4d0aa65d7dc6d4a55f SHA-1: fab9f73e357b24d7bb244cacf55a82f0e4601fd1 SHA-256: 50cdfea70028d24e63bb82451700fe98624814e371da7ab72c5443367b746777
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains embedded URLs, suggesting it may attempt to redirect users to malicious sites or download further content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious intent to compromise the user.

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/sq/ugae/~3/u8n3KCQdUYc/square?utm_term=hdl+cholesterol+55
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec9f72def1ca41d5fbd050/1626120050780/the_narcissistic_personality.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e914b7cc7c086459266c57/1625887927422/dilolar.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecafa828cbe0505436f409/1626124201121/mufiveko.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_off0000c677.bin
c3004c412aa82655ae97ed36f5efff47904dbe4cb3739ae14a14e0b221296afa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC677 10232 bytes
font_01_sfnt_off0000dd9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9E 16792 bytes
font_02_sfnt_off0000f5b0.bin
3fdaf95d98a64d0cb771a1a2812cd587dfbbe31291cdb577aaf8e455e3291dba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B0 16712 bytes

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