Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2dab1dcc90a5c7…

MALICIOUS

PDF

35.9 KB Created: 2021-06-19 03:29:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6fe5a301439767856950afdc811e6af0 SHA-1: 5947a44ff9fc45031f84f05f37470b6fcb370f48 SHA-256: 4e2dab1dcc90a5c73a9b950c09d6323483d02b631443452525e2a249f5a67877
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency ('Robux', 'Coin Master') and game hacks, directing users to external URLs. The primary URL, http://netcdn.co/app/431946152/join-the-group-for-free-robux-game-hack, is likely a landing page for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

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/join-the-group-for-free-robux-game-hack PDF link annotation
    • http://fishboat.hr/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-roblox-items-codes-2021_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-boombox-roblox_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://www.fishboat.hr/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://fishboat.hr/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/best-roblox-hacks_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_off00003247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3247 23280 bytes
SHA-256: b0936fbbe99caf8ed8436ea73bc60abbe9bbd86b5954bd57888d432fea60837b
font_01_sfnt_off00006693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6693 19344 bytes
SHA-256: 868a5235e20d21af0180d478deac46e4997750973cf3798724d237ccec0098ff

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