Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9022e1e25c0272…

MALICIOUS

PDF

36.0 KB Created: 2021-07-05 09:14:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 636ff63cfbde15834e63c8cce5db895a SHA-1: fdfdefdaeee51f14bc6824c9ae9cbadb4d27dcf2 SHA-256: 4a9022e1e25c02723e741899fd248e0fcc4d03bc7f9e6249f3078e4b7270c42d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

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/406889139/coin-master-free-cards-link-2021-today-game-hack PDF link annotation
    • https://loba.com.vn/public/upload/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-know-if-you-are-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robhacker-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/freespinandcoin_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/compile-roblox-hack-dll_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-cheat-codes-jailbreak_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-hack-roblox-assassin-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-joined-hack-script_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-win-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-muslce-tshirt-free_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-really-easy_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/game-hack-36-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/cheat-roblox-building-simulator_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
stream_002_off00003382.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3382 23232 bytes
SHA-256: e14efc0162262eef6964df582f4d7440021b33a3adb170d14dfe719f06d28b64
font_01_sfnt_off000067f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F7 18924 bytes
SHA-256: 4325d22604c985801318a09856abb239b71478aaf8f7ce5bde155a72b560a462

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