Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cbf01c444aa5e47…

MALICIOUS

PDF

34.9 KB Created: 2021-07-01 11:09:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a06f2c8187c5aba4f0a24a195cc692bf SHA-1: 122edbe21fc511451b59dd8ea870053b78a0cb07 SHA-256: 8cbf01c444aa5e47cc4542b78e02a7efe0911ef181c164f9378c8cb00cd82f64
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded URLs that are designed to lure users into clicking on them by promising free game currency or hacks. The primary URL, http://netcdn.co/app/431946152/2-robux-for-free-game-hack, is flagged as a high-risk indicator for a redirector to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit vulnerabilities or redirect the user to a malicious site, likely for credential harvesting or malware delivery.

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/431946152/2-robux-for-free-game-hack PDF link annotation
    • http://perpustakaan.pa-jember.go.id/repository/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/earn-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-free-robux-in-brawl-stars-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-hacks-in-roblox-no-scam_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/hacked-google-roblox-pacifico-2_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-promo-codes-december-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/is-it-possible-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-roblox-shirt-templet-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/cheats-robux-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-free-robux-legit_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-free-robux-in-2-minutes_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_off00003291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3291 22200 bytes
SHA-256: 1765436974f8fd797df3bd792b3415e6b5776990850ab85a84d69156df20da11
font_01_sfnt_off000063d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D7 18840 bytes
SHA-256: 12d7fe07633cb2c183790e1e988b16dec43ccb9c36fab2d1793cd91fbdf1dac9

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