Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafdf874644b0d0e…

MALICIOUS

PDF

73.5 KB Created: 2021-07-13 07:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dad6c38313363962677bd67823141235 SHA-1: a6741b172c6f383072451f9198ad126378f1e3d8 SHA-256: eafdf874644b0d0e2fdc25f0fa4d0e32decf859974185377f073491bef8246b6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. While the document body is heavily obfuscated and unreadable, the presence of embedded URLs and the overall detection suggest a phishing attempt. The primary embedded URL, though marked as benign in the provided context, is still listed as a potential indicator due to the nature of the detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

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/eoPDrVzwpx0/square?utm_term=mustang+from+i+am+legend
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecbf8dc6505401f353e8fe/1626128269647/66845549764.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ecc753c6505401f3548a2f/1626130259909/scooby_doo_monsters_unleashed_velma.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec88f4dbb514329fafb215/1626114292316/wunibetemukot.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8ea8af807f1e152633fd/1626115752772/rudigelonovosasuwe.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e95e1d2c5c2f6215cac309/1625906717648/18934107665.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e80a13adf2c26882026c0a/1625819667781/incrementing_variable_in_bash.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_off0000c0da.bin
3df868fe159958b6aaf0502765cb254f98bc65a0c524b2807712568335b12546		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DA 15724 bytes
font_01_sfnt_off0000e976.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE976 16792 bytes
font_02_sfnt_off0001018d.bin
e1bb698896ef268af563766c4de6fd957a79a65539d122eef6ff4d584e6f0cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 10788 bytes

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