Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba230d93d7c82ecd…

MALICIOUS

PDF

50.3 KB Created: 2021-06-03 13:58:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2a4b0f7f8f5ebc208001e15602d34952 SHA-1: 2071dfa3bda75176f979fc38cb3cdecab2b3046b SHA-256: ba230d93d7c82ecd35b3203fe992b3d73f4f7417cb83d3f33783e1d03da4e1cb
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and free currency, a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous related URLs strongly indicate a social engineering attack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lead the user to a malicious website, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://netcdn.online/app/431946152/google-how-do-you-get-free-robux-game-hack PDF link annotation
    • http://library.umla.ac.id//repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-tiktok-followers-500_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E8 29064 bytes
SHA-256: ed86664cc9829c2bcbb4e385c96bfee7f2a0c9d053978f637e72a50d2d8490a2
font_01_sfnt_off00009322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9322 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FCA 18972 bytes
SHA-256: 7e42234451cc840f7005e057c881a5adaeb6eb05dfbb8a23217c49a1ae6b06df

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