Malicious PDF — malware analysis report

Static analysis result for SHA-256 21222f82e163021f…

MALICIOUS

PDF

34.0 KB Created: 2021-06-20 18:29:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0751cd39e10ee8f7e1f74f16d5a66b34 SHA-1: 6a001fa93758a75be8eb9dd1916f5232e4ef5200 SHA-256: 21222f82e163021f5a0e367326579ef6787bcf9c469b60b8eee8667568d438a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generators" or "game hacks" for popular games. The primary lure URL is http://netcdn.co/app/431946152/free-thing-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/free-thing-roblox-game-hack In PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/free-views-tiktok_GM835599320.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/roblox-hack-iphone_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/hack-game-pass-roblox_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/how-can-i-get-free-robux-super-easy_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BC 21732 bytes
SHA-256: bab77fedcb8e5573c44c47d6f0a467cf9f77446bccfa88fa0dcc50f130934295
font_01_sfnt_off00006062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6062 18936 bytes
SHA-256: 7b1c21f5041faaee590c5de3f1e4913061817f4776635030998e92b8446ecbc8

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