Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b2a6339a143852…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 11:32:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 30b44316d74c963fe0e779be509c65d4 SHA-1: e84106e690d3d23548bf4496c3c6e73d66bbc520 SHA-256: 54b2a6339a1438525e14ce5d0f74fde2835c924b6027fb2198c09eee799466e5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic indicating it links to a game hack redirector, specifically targeting 'Coin Master'. The embedded document body and numerous URLs reinforce this theme, pointing to various game-related cheats and hacks. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-how-to-get-free-pet-food-game-hack, which likely serves as a lure to a more dangerous payload.

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-how-to-get-free-pet-food-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-admin-house-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/army-roblox-free-play_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-obc-accounts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-toys-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-roblox-hack-proof-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/2021-robux-profe-fro-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-vip-server-roblox-booga-booga_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
stream_002_off00003159.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3159 22656 bytes
SHA-256: ecb8995a78c366a0a3312059d5966a31687a5b2fdfce3e91fbd1c7bf6b6c49ca
font_01_sfnt_off00006439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6439 18492 bytes
SHA-256: 00f7e27725960740982393975f85afd719e37a0a3f01386c53951882e6753ccc

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