Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc13f8d243289145…

MALICIOUS

PDF

35.4 KB Created: 2021-06-28 19:23:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 619080ce69857ec236bb4a10da087f46 SHA-1: c2fdd88a3e98e4ce049e4522615fff0c3fc64611 SHA-256: fc13f8d243289145867344e610093d6eae03ed0cba457b102f91680405f871fa
82 Risk Score

Malware Insights

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

This PDF document employs a common lure of 'game hacks' and 'free currency' to entice users. It contains multiple embedded URLs, with http://netcdn.co/app/431946152/avatar-the-last-airbender-hack-roblox-game-hack being a primary redirector. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's designed to redirect users to potentially harmful content, likely a download or phishing site. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

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/avatar-the-last-airbender-hack-roblox-game-hack PDF link annotation
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-back-your-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/corrupt-free-roblox-torso_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-app-on-pc_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-k-upreme-freestyle-roblox-id_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/10-ways-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/best-free-roblox-injectors_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-vip-server-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/kachifpro_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-weebly-com_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/robux-hack-generator-no-download_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-shower-simulator-free-vip_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/easy-cheat-to-get-more-money-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/get-a-free-promo-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/robux-hack-2021-fluxx_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_off00003435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3435 22020 bytes
SHA-256: d50f1b007f3135da882732e9109ff6cc52af501a99c4ebeea68632c2503f21ac
font_01_sfnt_off00006455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6455 19332 bytes
SHA-256: 46b413ba0eacde67d0e18885a39676800cbdc427fca667dcf5693c760aa4a340

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