Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ef8c08010fd12b…

MALICIOUS

PDF

34.1 KB Created: 2021-06-28 11:50:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 99e6373b4958c166b37916a85a97655e SHA-1: dbd189e4a044deab577aa326d0e75702d28fc6b1 SHA-256: 77ef8c08010fd12bab6e1ae4afc3d1d199c37d913e06112f44f1807d35665158
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/free-robux-generator-hack-no-survey-game-hack PDF link annotation
    • https://pustaka.mic.sch.id//repository/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-hack-roblox-booga-booga-on-mac-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/get-free-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-hack-noclip-dll_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/ww-robux-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/hacked-roblox-accountsd_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-free-survete-addidas_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-use-inspect-elements-to-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/hack-counter-blox-roblox-offensive-download_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-hack-scripts-download-no-virus_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-obc-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/giftrobux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F88 21776 bytes
SHA-256: 2026186644ae9a356285f2379bb9e10d9a6051c78466a26e7ed954e6f2f77a35
font_01_sfnt_off00005f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6B 19284 bytes
SHA-256: f3534b2d90e503cba171d4b563754908cc9ca3fec72652da04f6f8e27179ab2d

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