Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a411a0e8cdb78d0…

MALICIOUS

PDF

45.0 KB Created: 2021-06-11 01:53:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 00dfea0705684da005dd42995448addb SHA-1: 8520254523d8f998c0b8fcfd7d3078d5c041cb64 SHA-256: 6a411a0e8cdb78d09a82dc2254ed60800720a669dee879b44378a4bcee3a6806
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document uses a lure of 'free Robux' and game hacks to entice users to click on external links. The heuristic 'SE_FAKE_CAPTCHA' indicates that the document likely presents a fake verification prompt to further trick the user into interacting with the malicious content. The embedded URLs point to sites offering game-related cheats, which are commonly used as a pretext for phishing or malware distribution.

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.tw/app/431946152/how-to-hack-roblox-and-get-free-robux-2021-game-hack PDF link annotation
    • https://tanahlot.id/assets/CKImages/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-c9m_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/rbx-claim_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/hack-client_GM479516143.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-free-dominus-roblox_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/rbxdemon_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_004_off000050e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E7 24880 bytes
SHA-256: f8866e1de8064e9c5d6a093a8b940b321a5e8d09f09a5ba908bf3b2e4b89b1d0
font_01_sfnt_off00008a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1C 19332 bytes
SHA-256: dfc328c246178b33eda47d7ec7ff30816ea33a9e5633e968c08877b5f6864a78

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