Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c94c925acbf8f59…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 01:32:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2a1acaffed54845c39ceb318093bbc23 SHA-1: dc75d27842d33129dc0978ef3282eec66d2bf7d2 SHA-256: 2c94c925acbf8f59ddb253506179d5758e15c13e048d7cf87a42ae8a5b1b995f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with promises of free game hacks and in-game currency, such as for Minecraft and Roblox. The primary URL, http://netcdn.tw/app/479516143/how-to-install-minecraft-for-free-game-hack, is flagged as a high-risk lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or scam attempt designed to redirect users to potentially malicious websites. The ML classifier also strongly indicated maliciousness.

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/479516143/how-to-install-minecraft-for-free-game-hack PDF link annotation
    • http://ghi.dk/billeder/hack-snow-shoveling-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-hack-roblox-accounts-december-2021_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/why-doesnt-roblox-play-with-cheat-engine-on_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-you-are-kicked-from-this-game-do-not-cheat_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-use-hacks-on-roblox-no-virus_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-get-free-robux-on-phone-2021_GM431946152.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
font_00_sfnt_off0000317c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317C 22260 bytes
SHA-256: 8632ebd92cd1954863cff3aaf7486bdf8fdb6e055f814ca189e388ebadd4426c
font_01_sfnt_off00006285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6285 18236 bytes
SHA-256: 80f9f3d3ddf194f52a7f748b585b61cd03432ad9892c468e4e347190080fe4ef

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