Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8026923172b284…

MALICIOUS

PDF

78.3 KB Created: 2021-07-15 10:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16eb6173aa75592d1a1ec583ce458549 SHA-1: 39280b60833a0766c7c9f88141f0d5a7a953ffde SHA-256: 9a8026923172b28476ae7d2a5ac5ee9a3de5a8076f05edb9e0b70f153bf5fad0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL suggests an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8740

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://medvor.ru/square?utm_term=get+a+hold+of+yourself
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e906d13b7e7c63344f2ad4/1625884369277/83734196629.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee204e796bb0196c5f91fc/1626218574612/64510976204.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee8e39aa539923b58ad0ae/1626246713218/68548332778.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e85247e98ab22bd7d49774/1625838151268/st_elizabeth_youngstown_phone_number.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8c2a5d8d5997ba4e5b34c/1625866917463/kevizibifo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e872ece19ac06d9c5ce90a/1625846509103/use_of_apostrophe_with_names.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_off0000d2bf.bin
e776d58a60bb022326bbe59774233d9c69b54d46071fb7bd0b20c84e5276c679		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BF 10508 bytes
font_01_sfnt_off0000eae2.bin
ad523be239ef11fe5bcbc981d6eea8cd7d15884a7bcd7d8bd285edf85a93ad77		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE2 16376 bytes
font_02_sfnt_off0001157f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1157F 16792 bytes

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