Malicious PDF — malware analysis report

Static analysis result for SHA-256 d141d5e2d470f1f8…

MALICIOUS

PDF

34.3 KB Created: 2021-07-08 18:20:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d0c1dcd2e2457f990f073d90ca317f27 SHA-1: e85f0cc4a2cff0e7e1daca2ab7b1b607c9e4ff35 SHA-256: d141d5e2d470f1f8de39d8b46b3b8aa185c549c656496147635dfa40582be28a
82 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks, specifically mentioning 'Coin Master Free Coins And Spins' and linking to a URL that appears to be a redirector. This suggests the document is designed to trick users into visiting a malicious site, likely to download further malware. 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-coins-and-spins-group-game-hack PDF link annotation
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-2021-on-phone_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-rublus-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-free-no-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-any-gamepass-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/robux-cheats-com_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-glitch-cheat_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-bee-simulator-cheats_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/cheats-for-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/robux-club-roblox-online-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/windows-roblox-hack-client-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-robux-on-rbx-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-speed-hack-with-bitslicer-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-mad-city-hack-money-francais-saison-3_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-someones-account-on-roblox_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_off000031e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E5 22084 bytes
SHA-256: 35633837ca951fbb339d722bab1b7471a23951c94dd22479ad6131b96eba7944
font_01_sfnt_off000062e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E5 18488 bytes
SHA-256: fb59b1f5ad3b1d78d5ae9c71c2b2cb39d8a8a8878e6ccc76b5c7eaa0d92d8094

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