Malicious PDF — malware analysis report

Static analysis result for SHA-256 042cff30c2e73225…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 07:56:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dfaf3f18af68da3e4ffb799088e5dc1d SHA-1: 172540ae9aa8a2f22f8a8db4db593441a66f5b29 SHA-256: 042cff30c2e7322529d3ddf791ae7cb8a13d4e008aa964d276dc49141a919b2e
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 0.9865

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.online/app/431946152/roblox-free-vip-server-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/poke-coins-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/tiktok-free-10-followers_GM835599320.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
stream_004_off000051f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F2 25768 bytes
SHA-256: e199cbab9a22de0dff049230c0c7c6ca062538c6844b7ec8bb888c68018e7aca
font_01_sfnt_off00008bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFA 18492 bytes
SHA-256: 1efcb06d77819d5fa3ff728d904b801bcae5178dc1aecdda37cae25940162132

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