Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3f0f028827d376…

MALICIOUS

PDF

35.2 KB Created: 2021-06-19 03:58:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7aa2fc791857e651f35c4e0dfeba5919 SHA-1: aa19d42951bc91fca382f5dc5dd2564d9730917b SHA-256: 8f3f0f028827d376e6804c38726d3b236dcaa7dd0726ea35ea24f67f11f7778f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/roblox-lumber-tycoon-2-whitelist-hack-script-game-hack PDF link annotation
    • https://opac.itp.ac.id/repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-free-without-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-skin-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/pet-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-no-inspect-element_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-blood-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/mega-marble-roblox-hack_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_off0000305b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305B 21988 bytes
SHA-256: bbbd7635cd6fc718da8213eec3a8fa2645dfdbf36528953b639099771f241f52
font_01_sfnt_off0000613c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613C 20124 bytes
SHA-256: 8b242ce3d96ffa02726f64e578892dd48fbb75508adb5cd902e8984a770ec7ba

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