Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a6b394cafa3ed7…

MALICIOUS

PDF

36.6 KB Created: 2021-06-30 10:28:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b7b8ac47407b03429ae4e6f7317e8f38 SHA-1: 8dd8b91769035bf0e6fdd910f01caf21ee785370 SHA-256: 99a6b394cafa3ed751dbd765b6e05a80a7137593ac5b8563399415702a5abdcb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacking and free in-game currency, specifically targeting Roblox players. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially malicious websites. While no scripts were directly extracted, the nature of the lures and the ML classification indicate a high likelihood of malicious intent, possibly leading to malware download or credential harvesting.

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.co/app/431946152/consquence-of-hacking-roblox-game-hack PDF link annotation
    • http://atiltd.com.tw/upload/files/roblox-fly-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/get-free-robux-on-android-2021_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-how-to-hack-a-perso_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/hack-on-roblox-to-not-die-in-obby_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-boombox-on-roblox-script_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-generator-2021-robux-hack-no-survey-updated_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/setting-up-cheat-engine-for-roblox_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/a-group-that-give-u-free-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/proto-roblox-hack_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-free-robux-club-in-2021_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/rbx-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_off000034d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34D5 23704 bytes
SHA-256: 957f9fa82ae64bcdffcddb207a597864f9f2b64218973e338b0fdd21b3c7b335
font_01_sfnt_off000069d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D3 19084 bytes
SHA-256: 48d174c474c559120a7129b738c504d9bb623774b43aad1927b2ed3be45589f2

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