Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea7ec9c3cd4e482…

MALICIOUS

PDF

75.3 KB Created: 2021-07-21 01:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 82b1df9b6568404af5d467be8656ca6c SHA-1: 2d44a3ddc90fe15ad54f75b58df2651ec5c10894 SHA-256: 6ea7ec9c3cd4e482076d27d408a62d02853f90489371663f0ec8b067051c0fa4
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document uses a social engineering lure to trick users into installing a browser update or plugin, likely to facilitate credential theft or malware delivery. While no scripts were extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/~3/7R6buoffwiA/square?utm_term=how+to+play+custom+zombies+maps+bo3+ps4
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f61bbdaaa839667713a92b/1626741693882/kings_canyon_visitor_center.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2170ac5d9e6782cd4682f/1626478347071/definition_of_tearing_up.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e91a542a6f785f583423c7/1625889365102/rakupimuxejibaxakob.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_off0000c38c.bin
ad5f9a2137571c75942a0ac46942f48a236756ba90870df7b97df00c2970ac8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC38C 17068 bytes
font_01_sfnt_off0000efd4.bin
45eb6ae3e4f83bd234e7dfb623cad26a7d1c490e7c6056accc68e5c863a09333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 11072 bytes
font_02_sfnt_off0001099f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1099F 16792 bytes

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