Malicious PDF — malware analysis report

Static analysis result for SHA-256 433bee7b77d7088d…

MALICIOUS

PDF

33.6 KB Created: 2021-07-08 13:23:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 240b443e23733a0d5b80ff12e033a0fe SHA-1: 350c5dcc875602a194f75d9a186644dff9a5d26e SHA-256: 433bee7b77d7088da8579eebbdb7cb8be882b76e09a4e02b646ae8ef36d10d52
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/406889139/how-to-get-free-spins-in-coin-master-game-hack. The document body and heuristic firings indicate a lure for game-related hacks and free accounts, designed to trick users into visiting the malicious URL. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/how-to-get-free-spins-in-coin-master-game-hack In PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-free-draw-2-anime_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-free-hair-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/cheat-power-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-parkour-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/hack-roblox-btools_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-live-stream_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-hack-roblox-passwords_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED0 22368 bytes
SHA-256: bc86af5b6ede0cc17668707705452207852e2ce3212f3f7e447e4c39b318cfe1
font_01_sfnt_off00006099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6099 18336 bytes
SHA-256: 11de4304e4fdf887d410d1e4a25cee46ae29c04a9263dbbe12b650d8207992b4

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