Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8ab39db549fc95…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 14:31:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8eff8caf027607eef9592f64886fb10a SHA-1: 8f33a1c824698c82a06511fe37198042a55f4a38 SHA-256: 2b8ab39db549fc95ac3b0f671cfbb79210469265bb8ca7ed46a9e347bac79e07
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to entice users to click on embedded links. The primary link, http://netcdn.tw/app/406889139/coin-master-free-spins-link-2021-hack-game-hack, is identified as a redirector for a 'free generator / game hack'. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for further malicious activity, such as downloading a second-stage payload or redirecting to a phishing site.

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-spins-link-2021-hack-game-hack PDF link annotation
    • https://pasca.unisba.ac.id/elibrary/repository/cheater-cheater-best-friend-eater-roblox-song-cide_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/wearedevs-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/game-dev-life-roblox-free_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-hack-autoaim_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/cheat-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-can-we-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-click-the-button_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-money-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-faces-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-rubux-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-hack-one-death-run-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-coins-link-march-2021_GM406889139.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_002_off0000328e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x328E 23076 bytes
SHA-256: dd8f6de54f62dc216f939a5cd4fd7ef0bbe6514ad7a88453f76013dc8233ef21
font_01_sfnt_off00006694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6694 18748 bytes
SHA-256: 8ee559f3b7bcb41d8d671c9caf17dff0473bece2e90a331a809c0197988e0d0c

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