Malicious PDF — malware analysis report

Static analysis result for SHA-256 c524f30bec04840c…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 02:31:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f4fd42ece524e2fee8d58f87fd5127d7 SHA-1: 9b7bdfead77b8d0575422b04bbb36072c3ee6964 SHA-256: c524f30bec04840c8effc322857b9725a8401a20f5cb3763e16c99173e178352
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic firing for a game hack lure, directing users to a suspicious URL. The ML classifier also flagged the PDF as malicious with high confidence. The document body and embedded URLs reinforce the lure of obtaining game hacks or free items, which is a common social engineering tactic to drive users to malicious sites.

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/479516143/minecraft-hack-ios-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-obc-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-without-hacking-on-ipad_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-download-roblox-cheats-hack-tool-v2-3_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/comment-hacker-roblox-version-anglaise_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-admin-commands-on-roblox-jailbreak-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-boombox-games-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-gift-in-big-paintball-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-account-username-and-password-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-generator-no-waiting_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-and-birds-head-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-pastebin-stuff_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-32-hack-apk_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_off00003143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3143 22448 bytes
SHA-256: 008af0cf1f0439eb20c51612a074411d3f77b8f9bf95cf4a587961c83bba7703
font_01_sfnt_off00006315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6315 18168 bytes
SHA-256: c3c50bea459d69e7b3a3aea9490f5d1ceabbf4cb609cc8e82411d9f0576acb1d

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