Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb9adecace5ad35…

MALICIOUS

PDF

75.6 KB Created: 2021-07-12 21:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d36961b82e8ecc0b5989d0473a7eedc SHA-1: 1b85e3724c6380315b1c72832055cc114c3551e2 SHA-256: 5fb9adecace5ad35a9f84fa0fa6850f339dc9e0bc353e38771dd51e1d1f82a2e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV with the signature Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0. An ML classifier also flagged it with a high probability of maliciousness. The presence of embedded URLs and the nature of the detection suggest a phishing attempt delivered via a malicious PDF attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7056

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/IdU8rIDf9lQ/square?utm_term=war+and+strategy
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e87e8bd0937b753b7cadb6/1625849484147/early_stage_psychosis.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7ba824d2175279d11c541/1625799298919/kevakuxujomezekazatu.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7ccf4c0b954f9ea3927d/1626111183792/punazomoziwe.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec79ccb8cbe518df56e9bd/1626110412203/what_is_the_first_philosophy.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_off0000ca86.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA86 16792 bytes
font_01_sfnt_off0000e298.bin
221f065fa08bd619b5000ebcbcfceea9d37875a68160f23fd0dcc00dde9d9b11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE298 15616 bytes
font_02_sfnt_off00010a95.bin
5b899eac19261909e567344620ec20cb284d13e5ffbe60e57078045b617b2b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A95 10272 bytes

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