Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4fb948fff5b997…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 11:11:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ece2b6206164cfb3a3c5225c9b5e0142 SHA-1: 3d521ea16c576c4313ffed4911513f3483a0aebf SHA-256: 9d4fb948fff5b9973072443a0971430a78a190f8c789d9bba5641b01a12d506f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free in-game currency, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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/get-free-cards-coin-master-game-hack PDF link annotation
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-1-step_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-into-roblox-database_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-dll-cheats_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-games-free-roblox-games_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/pokemon-go-free-outfits_GM1094591345.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/real-free-robux-generator_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_off000032e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E2 22220 bytes
SHA-256: c649ae33aec40dd573d44a41fd86be391f8f0437f8dfee7aaef74b96244269e3
font_01_sfnt_off0000641b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641B 18172 bytes
SHA-256: ab80e3c1f88e3b8fd7e0672df70ead6a1706ea1e7c7a71db5d1bb16ff27d331b

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