Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fcdf526788c1390…

MALICIOUS

PDF

40.2 KB Created: 2021-04-29 01:08:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 77f747a209e578ed0ce31770c4e88bab SHA-1: f17d2c574a2e5ba1181e562e8c7502dfe64f42ce SHA-256: 0fcdf526788c13900275eb51227200f89ba1288a3d712fa51795a761c4d495a6
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a heuristic firing for a browser installation lure, indicating a social engineering attempt. The document body and embedded links suggest a lure for free Robux, a common pretext for distributing malware or phishing for credentials. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • 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
  • 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://netcdn.xyz/app/431946152/free-robux-on-mobile-android-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/2021999-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-hack-pastebin-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-hack-app.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-cheating-hacking.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-ro-hero-academia-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-limted-time-game.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-robux-free-codes-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-no-verification-ios.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-someones-roblox-account-for-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-someones-account-in-roblox.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000041cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41CF 25500 bytes
SHA-256: 5acc377340dbd1942bd5ab14df4b52f0211c81e8469e98402949d55cf4c9ae4c
font_01_sfnt_off00007a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8F 18576 bytes
SHA-256: d448071a1cf1ef5f8e72964fcc272da3c90a3fe41923b307d528076850318292

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