Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce78a42f0334140…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 07:07:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 49d2c4c88c53139be430724249fad687 SHA-1: f712dde25e0709017b717aff309384079a12b5e3 SHA-256: 5ce78a42f0334140292f9d64e7d53cad7aa9b5c4a4e216ad8605209250cd4287
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/how-to-wall-hack-in-jailbreak-roblox-game-hack PDF link annotation
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-hack-jojos-bizarre-side-project-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-pants-roblox-boy_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/descargar-hack-de-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/pubg-uc-daraz_GM1330123889.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://krnl.rocksIn 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
stream_004_off000053bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53BC 25380 bytes
SHA-256: 4a0744e9a698f2df196b525fc5a5ccb15ddb0dee95e1bc3dfc6f8019ce44d5a2
font_01_sfnt_off00008e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E71 18832 bytes
SHA-256: 145540aab548bc36467acc2adaf07825bee3019d32f3b15455507585425393a6

Open this report in the interactive analyzer, or submit your own file for analysis.