Malicious PDF — malware analysis report

Static analysis result for SHA-256 940d251036049c8c…

MALICIOUS

PDF

49.1 KB Created: 2021-06-03 13:18:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bc3ef170aa3c7bffeb6c64ccf2b312f3 SHA-1: 424bb3c01c52af16be235f889b372d7da9e48b2f SHA-256: 940d251036049c8ce0658b89ad0f88f1fa82ac39534b4a39ed068d623b996357
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 0.9796

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/406889139/coin-master-free-spins-and-coins-blogspot-game-hack PDF link annotation
    • http://lib.mappifhui.org/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-a-gamepass-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005360.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5360 27196 bytes
SHA-256: 541fdf35f7b4cf17d48b3e5ed2972abfa00d1e04bb33dd46f301b19e19d3fd82
font_01_sfnt_off00009127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9127 3204 bytes
SHA-256: b7fe42cb1da39e96c756399b3532633df029c1fbb3443b9e17d98df25c90dc65
font_02_sfnt_off00009c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C2B 18636 bytes
SHA-256: 0f54115b9972647639797d248389657ce322f7c5c12f639c73d71ff235a73201

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