Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ca0397b90fe5dd…

MALICIOUS

PDF

74.2 KB Created: 2021-07-13 00:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eacc85b48d5e31509b17c1c46657dea1 SHA-1: 96cf4e96fe1b722a2380b294a03487db22cf4443 SHA-256: 56ca0397b90fe5dd8c410bcd9ff8445963d9b4b1cf6ebf0f53e5300316080dea
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV, specifically as 'Pdf.Phishing.Trojan'. It contains multiple embedded URLs, one of which is flagged as an external URI, suggesting a redirection attempt. While the document body is heavily obfuscated and unreadable, the presence of these URLs and the ClamAV signature indicate a phishing or trojan distribution attempt. No scripts were extracted, limiting the analysis of specific execution techniques.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

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=ielts+writing+tips+and+tricks+academic+pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8bc0cd8d5997ba4e528f3/1625865228866/a_sales_objection_is.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7fd7dd2ac847ff7e3ff4/1626111959179/gozawopafozikala.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_off0000c178.bin
1f6fe0d61d58a091d2eab5cb0f1215c306ee1b3821a96c6e8f930a119a2b9efd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC178 16368 bytes
font_01_sfnt_off0000ebc3.bin
74321b6d75dd37d35ca58d9fa606b3fd50c6ad7806ee83e1c109d28f94321e7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 10972 bytes
font_02_sfnt_off0001050f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1050F 16792 bytes

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