Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0782cc67c33af07…

MALICIOUS

PDF

80.0 KB Created: 2021-07-13 20:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e44dce864660aa252cecc4c39435a07b SHA-1: 0e3546bbe905000f69b52e547fd80103d3c5b14a SHA-256: c0782cc67c33af075a16e74a6e9c905d03c7fab0290805c3f1122c42552300a4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The embedded URL is likely intended to redirect the user to a phishing site to harvest credentials or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8584

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://crewmak.ru/square?utm_term=the+girl+who+hated+books+pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7b603f7a034ccb79a817/1626110816171/nosodage.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec9188f91837287387ea11/1626116488634/pubopepagobemevoma.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edc4797ce58f02ed91145a/1626195065480/weed_eater_22_excalibur_manual.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e9389f3ba7d954d546f06f/1625897119788/58271622281.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec99289a1cf201f8068a08/1626118440660/lord_of_the_rings_3rd_age.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8187dcef4a49b3aab8d1/1626112391602/lexicographically_meaning_in_c.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7e41aa3609a707bac6e7c/1625809946241/what_to_eat_for_a_flat_stomach_in_3_days.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_off0000d55d.bin
e4053c98f2084015d1dcfad1c2cd8c41828e0380ab2f8a4f2fedc9b7b03f6c48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD55D 16932 bytes
font_01_sfnt_off00010129.bin
d822825fc00ef4e600321c4a0d16da4bec2abdc34ff156f4cc49d697f89c3e65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10129 10952 bytes
font_02_sfnt_off00011a57.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A57 16792 bytes

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