Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f2863fc4860dbd…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 17:37:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c0aadca633ecd19cdc23d339e4b24570 SHA-1: d7e5559075af8e066941bfdd41b20f6cf31f5c4e SHA-256: 64f2863fc4860dbdb718ad6d3d6b18d46f4768bb801b8bdf8409221ef3bad4fa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and generators for popular games. The presence of a visual download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further stages of infection. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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-lovenet-game-hack In PDF document text
    • https://perpus.upp.ac.id/digilib/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-system_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-installer-mac-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-online-free_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_off00002e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E82 22288 bytes
SHA-256: 399d57067136349368fe29bc4cec9fdbbe1c1e459d0f77af8eaab78a49bff772
font_01_sfnt_off00006020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 18704 bytes
SHA-256: 36552c55d6b01c3633473854ce8ec45091a4a8a9b855d0711e20b63456f47980

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