Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e576baa4b07963…

MALICIOUS

PDF

34.1 KB Created: 2021-06-28 02:19:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 142d0892c51517a76333cbac81016fa1 SHA-1: 2689608dde903aac7d2f7af287be9b092b55a208 SHA-256: 81e576baa4b07963cea8b209c9070c8b9759cb342ef16c224c3f7fbdfde6c88f
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-free-ninja-mask-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-bit-slicer-hacks_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-obtain-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-robux-hack-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-roblox-bee-swar_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hack-2021-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-wings-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-freebies-robux-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-bloxburg-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-banner-maker_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/super-saiyan-simulator-2-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_off00002da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA8 22444 bytes
SHA-256: 7e1cad3eae829a1bab61e775bd7ba5164c04b4d0e6bb759fc46d1bcf0580492d
font_01_sfnt_off00005fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA5 19324 bytes
SHA-256: fce43812d9ea7be082d08648466be999d5c08939e62168fbeb0945b6c9d96ec7

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