Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba30cb9828bece5…

MALICIOUS

PDF

35.5 KB Created: 2021-06-26 09:38:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 52e760a63ad81b4aa0e638b8e4af53dc SHA-1: 1c829069887f107c4c69c742baa69d0bc632f6b9 SHA-256: 2ba30cb9828bece5dadc2a42729c5a8bf107104f44c764dd4bcc95c22ddea74f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with game-related cheats and hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates redirection.

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/work-in-a-pizza-place-roblox-swim-cheats-game-hack In PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/how-to-get-free-stuff-for-your-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/free-robux-no-verification-and-survey_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/how-get-free-stuff-in-roblox_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/hack-turkey-roblox_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/free-robux-roblox-hack-swirl-candy-girl_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/what-is-e-free-roblox_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/how-to-make-a-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/finding-free-robux_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/coin-master-support_GM406889139.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/roblox-free-rich-accounts-2021_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/free-robux-group_GM431946152.pdfIn PDF document text
    • http://gabrielprogramador.com.br/alfaleiloes/upload/files/coin-master-spins-hack-2021_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_off00003241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3241 22480 bytes
SHA-256: 3119ce4afe401e8920f2c2a517f41274aa9871b44ed307416cba2140eda46a78
font_01_sfnt_off00006355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6355 19904 bytes
SHA-256: d4e0d9a8be48d404fefd7f2747e0ced1b787db7939ccfb24ded19e8fb2e3425d

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