Malicious PDF — malware analysis report

Static analysis result for SHA-256 a166a2c8346f97d8…

MALICIOUS

PDF

48.3 KB Created: 2021-06-03 10:51:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9d4de6bd9e5dfa23c825043debd78a87 SHA-1: 131c6abadf748e5ecda4ac5917249df3270ad557 SHA-256: a166a2c8346f97d81ebfb0ead9fdcf1305b2b51c7fd538578e51744fe24c54bd
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 0.9796

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 https://netcdn.online/app/406889139/free-spins-on-coin-master-without-human-verification-game-hack PDF link annotation
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-hack-site-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/pubg-uc-300_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/pubg-uc-200_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54A1 25760 bytes
SHA-256: 6f781b67414b9c914fc2a64ab03967051e6334d68b4c8d6f2968b40bd908937b
font_01_sfnt_off00008eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEF 2896 bytes
SHA-256: 98478e2fbfabd582329b6206c0d46f67523cf5e299cb16118f1065b4dd5ec6a6
font_02_sfnt_off000098d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98D6 18784 bytes
SHA-256: 960842b6fe33ab0647d2f84e57a2bd0982928fead2374cfcf5cb9148229d7a4f

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