Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca64e2c7389a4a1b…

MALICIOUS

PDF

32.6 KB Created: 2021-07-03 21:30:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4fdc9a0e5b1bd2e96ad9c2942995e80d SHA-1: 857bd39f8b8c26f23f4ed6d50440bb3a8714421b SHA-256: ca64e2c7389a4a1bee25184f07a7d911e628f7a75402fbbcf046c7bd87dfc24d
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 0.9824

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-free-coins-game-hack PDF link annotation
    • http://perpustakaan.pa-jember.go.id/repository/hiw-to-get-free-robux-on-roblox-2021-bfast_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-test_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/cheap-roblox-super-power-training-simulator-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/fahrzeug-simulator-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/hack-de-luckyblocks-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/robux-hacking-code_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-shinobi-life-face-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-exploit-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/como-se-hace-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/descargar-hack-para-roblox-dragon-ball-rage_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-free-robux-easy-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-hacking-gameq_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/jailbreak-roblox-hack-dll_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/websites-that-give-free-robux_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
stream_001_off00002a24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A24 23040 bytes
SHA-256: dd75feddcbba31a71385cb8003694277ccf79f6b38ccd5fe8d7b6f2e0ddece57
font_01_sfnt_off00005dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBE 17996 bytes
SHA-256: 2ec206c530faa3d40eac36f14655b3e9b935e9ff12c648634e177d5bc9421463

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