Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc9f886b804fa29…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 02:54:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5491c6c9f73df2fc4f75fb2ff39935e2 SHA-1: ab7936372bc38d9f14c4ea74c3239e819692218f SHA-256: 1fc9f886b804fa29d819b84dacbfdda1445e83bde7006c06d85b146e3226f894
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link and text related to 'Coin Master Free Spons Apk 2021', indicating a lure for game hacks or generators. The embedded URL, http://netcdn.tw/app/406889139/coin-master-free-spons-apk-2021-game-hack, is directly associated with this lure and is flagged as a high-risk redirector. 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/406889139/coin-master-free-spons-apk-2021-game-hack PDF link annotation
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-robux-hack-no-survey-or-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-too-hack-roblox-carlos-amin-house_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-promo-codes-roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/descargar-fly-hack-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/pokemon-go-free-647_GM1094591345.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/youtube-how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/www-robux-us_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/can-pokemon-go-free-promo-codes_GM1094591345.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/get-free-robux-com_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_off000030fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FA 23128 bytes
SHA-256: bb548225ca9eb8fa3b7f553c2844d9ef26350b7fadbd844942bd461987cc1170
font_01_sfnt_off00006520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6520 18748 bytes
SHA-256: 5e77ef61f71b9edceb1db79b59856649b40968d05cf737e8f2ff8c48d385844d