Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e9fc1b98cdea57…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 17:18:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0da27f6660ac9d799870572f24a51c4f SHA-1: 00ddd882aa00ba939680ff42fb3047f1893172d3 SHA-256: b7e9fc1b98cdea5790852f7eeb93290dc76fff627ffc3a388a8821623da5f370
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-risk heuristic firing for a game hack redirect lure, pointing to the URL http://netcdn.tw/app/431946152/inappropriate-roblox-games-game-hack. This URL is likely used to deliver a malicious payload or lead the user to a phishing site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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 http://netcdn.tw/app/431946152/inappropriate-roblox-games-game-hack PDF link annotation
    • http://www.digilib.uim.ac.id/repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/hack-menu-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/pubg-uc-quiz_GM1330123889.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/pokemon-go-free-version_GM1094591345.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/tiktok-free-generator_GM835599320.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3121 21972 bytes
SHA-256: 04154abfd29ec8f755c757a533581c63a1e536a38a40ea15cb02b0b75ff6c521
font_01_sfnt_off000061da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DA 19144 bytes
SHA-256: 79a6a5a9ae6257ea638799cb32a861e3301f0777c40791eec12f5a449b6bff8a

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