Malicious PDF — malware analysis report

Static analysis result for SHA-256 9159ae28b314d0db…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 00:09:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7255a078b189e78c94ea891b0a7a72e9 SHA-1: 23468701b7ea6f961693127dd10da6ac98a73e55 SHA-256: 9159ae28b314d0db7292e76560d3df1b25378aabf442b563eadff424da89244f
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.tw/app/406889139/coin-master-hack-without-verification-code-game-hack PDF link annotation
    • https://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-free-robux-easy-down-load_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/free-robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/roblox-theme-park-tycoon-2-money-cheat_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-roblox-banner-maker_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/robux-free-giveaway-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/how-to-hack-any-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-pokemon-go-joystick-2021_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/can-a-roblox-exploiter-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-robux-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/free-live-giveaway-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-hack-fairytaill-forgoten-legend-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/get-free-spins-on-coin-master-2021_GM406889139.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
stream_002_off0000331b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x331B 22860 bytes
SHA-256: 5a12fdff5754c0acb240eb18798c73d5e0ed3423439ad956b2b12c73209c7862
font_01_sfnt_off0000667d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667D 18816 bytes
SHA-256: a9e0a618903bb392e01413f9b152c22796f511f28b171904dea730d40abc975b

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