Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79fec1d9fce20d6…

MALICIOUS

PDF

48.3 KB Created: 2021-05-12 10:05:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1bc8cd32d320796ab9ec83927f1d784c SHA-1: 166d5b6ce8b8fcb0b30dd96def56a52492cc237a SHA-256: e79fec1d9fce20d6331d361e82bfd752d363d934e3df66a435c6a4c14839611c
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 0.9013

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.xyz/app/431946152/google-how-do-you-get-free-robux-game-hack PDF link annotation
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-zone-free-robux_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_003_off00004c30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C30 28392 bytes
SHA-256: 36eae2a23de63d5a6549c12dfdcc5dfb3f5dc1e231f5714885fe7c1524811955
font_01_sfnt_off00008e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6B 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00009868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9868 18972 bytes
SHA-256: 7e42234451cc840f7005e057c881a5adaeb6eb05dfbb8a23217c49a1ae6b06df

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