Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d49427ea511dd8…

MALICIOUS

PDF

82.5 KB Created: 2021-07-17 15:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f6238802dec322c657a86aea9c3185e7 SHA-1: 943bc1c7dc4b01dac27e7317e29a8ae5a0165543 SHA-256: d4d49427ea511dd8abb14d7c3e7bcb04bca002401519d20f43d50ed2755e4a6d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI heuristic points to a suspicious URL, which is a common tactic for phishing or malware delivery. Although the document body is heavily obfuscated and unreadable, the presence of embedded URLs and the overall malicious verdict suggest an attempt to trick the user into visiting a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8365

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/iXsW93xxTQA/square?utm_term=ding+dong+ding+ding+ding+dong
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e94b65db8bb141bada990d/1625901925637/fegegipugot.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee5cff64675e3b9de35c21/1626234111425/regedoriluxa.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f268f59dfa584dc9d5a603/1626499317773/sexually_active_band_geeks.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f03f4d7fedc2490c0de11f/1626357581517/29173758846.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e76cb79aced45fe32e2d31/1625779384288/he_that_believeth_in_me_though_he_were_dead_yet_shall_he_live.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_off0000e28c.bin
599997a4e46f5d76243a9f615f8d35263d0446e99de6a6899146038ffde721ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE28C 17604 bytes
font_01_sfnt_off00010f9d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9D 16792 bytes
font_02_sfnt_off000127b3.bin
107205ef96958b7e68a8f4c03104ffd1ef8c870c117b47b4fa38d7710d110257		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127B3 9720 bytes

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