Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b67d3f8fc7b2cd9…

MALICIOUS

PDF

71.5 KB Created: 2021-07-17 07:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e598a19f455a08e1e2738226377d751 SHA-1: 4aeff63d1d14cc6f8502675a91214d81ef5705f4 SHA-256: 0b67d3f8fc7b2cd9e3bf5fd6dceb38486746d633195f515c0c9c28e6bb1d17fc
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The PDF contains embedded URLs, one of which is associated with a phishing lure. While no scripts were explicitly extracted, the presence of embedded URLs and the ClamAV detection strongly suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.1869

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/AnJPYMJXbyQ/square?utm_term=urgent+care+on+central
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e942e937cb90447560fd22/1625899754099/sunnydale_holiday_park.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f073f4a20a7272f5bf8b77/1626371060704/50000_toman_to_usd.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_off0000bbc6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC6 16792 bytes
font_01_sfnt_off0000d3dd.bin
413ef153c4b038914af194dddb4200da8be2d85059a03e99e3369cbf90a17e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DD 10152 bytes
font_02_sfnt_off0000eaaa.bin
1090b250006e14c38b4da2ebf2750724d2824dd9919232cb4473ce322da10432		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 15560 bytes

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