Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c97311ead6f89d…

MALICIOUS

PDF

78.2 KB Created: 2021-07-19 03:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a880fa544300f030d0e67ba1ad8b025 SHA-1: 780aa7bfacf757ec913bb76135d94457da13d2c5 SHA-256: b7c97311ead6f89d05c9f0a9bc6d1652d3a2e09ff4ddd3d08c3aabaf6ac671a9
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. It contains embedded URLs that likely lead to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to external content, aligning with common phishing or trojan delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/sq/ugae/~3/UQ8tT55rDuk/square?utm_term=history+one+damn+thing+after+another
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92be48ce0e10532d30b49/1625893860743/14254043741.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed39ab3b21860fe66edf8f/1626159531114/made_easy_workbook_solution.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1a4533b20c96dbe6ef3d6/1626448980088/sexizijupal.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93ebcb10b9b33fa98a139/1625898684470/monofolukina.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_off0000d42c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD42C 16792 bytes
font_01_sfnt_off0000ec43.bin
e84d89a34c4eb18c9223cd6098340396832b707d6e71c487fa247f19ade2517c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC43 10860 bytes
font_02_sfnt_off000104f3.bin
15a49c326bd82a65b64a2ca94ed39588dceaf058fa4551a82c63c3057105c86e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 15580 bytes

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