Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb8f4d4fc4db56a…

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 21:35:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0af1b7d4f0958b7e6906b55327d5a65e SHA-1: fac95abd6eea01c4147ba36a6f8288afece2fb55 SHA-256: 0cb8f4d4fc4db56ac8b3dfdf060f6733baf9ebd97feb01675ce5b0647ef508cd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs and a document body that explicitly lures users with promises of game hacks for Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this, indicating the document's primary purpose is to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the nature of the lures and embedded URLs suggests a phishing or malware distribution attempt, likely leveraging JavaScript for redirection or further payload delivery.

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/431946152/how-to-hack-roblox-accounts-2021-game-hack PDF link annotation
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/granny-all-badges-hack-roblox_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-coins_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/roblox-free-money-hack_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/open-coin-master_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/roblox-test-for-free-robux_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-robux-javascript-pastebin_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/tiktok-free-robux_GM835599320.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-roblox-hack-script-executrer_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/roblox-bloxburg-free-gamepass_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/robux-in_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_off00002e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6F 22284 bytes
SHA-256: 3032e92ef71ffe67e79584fd4d7e10d93c827356e6d04da2115af7f852dfa3bd
font_01_sfnt_off00005fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE4 19468 bytes
SHA-256: c059e5ce0b13cf3e98c6bfdb87126f354e1dae45520eeb333857e6d2b791b0b8

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