Malicious PDF — malware analysis report

Static analysis result for SHA-256 600441e468be9a90…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 15:25:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c609b15ba774db3850d167f5c1ece2a0 SHA-1: 80e590004c3747f0391d2894b40cde2b3d3ea557 SHA-256: 600441e468be9a9057fea53fd4491d0127e102ac262246674ade1264efadfdb3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as a game hack download. The primary lure is 'Roblox Prison Life 20 Hack Download', directing users to http://netcdn.tw/app/431946152/roblox-prison-life-20-hack-download-game-hack. This suggests an attempt to trick users into visiting malicious sites, likely for further malware delivery or credential harvesting. No scripts were extracted from this sample.

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.tw/app/431946152/roblox-prison-life-20-hack-download-game-hack In PDF document text
    • https://pustaka.mic.sch.id//repository/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-roblox-accounts-2021-may_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-codes-info_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-hack-a-roblox-account-2021-easy-march_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-hack-cheat-engine-64-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/vb-2win-live-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-games-for-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-2021-robux-on-roblox-free-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-hack-rich-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-cheats-on-girlfriend_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-how-to-hack-games-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/singing-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-martial-arts-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-free-robux-mobile-root-needed_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/haktuts-2021-coin-master-free-spin-link_GM406889139.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_off00002ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBE 21788 bytes
SHA-256: 752fcfcac6feafbe51a854a3169a6ae19f9d63c96412c904d4b12cdf8f3a264e
font_01_sfnt_off00005ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC9 19732 bytes
SHA-256: b25337e44c607759fe4c3fa6f23d38d498d52a8faf8e17401e5e8adb34d82116

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