Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff003a82f6acfa90…

MALICIOUS

PDF

50.9 KB Created: 2021-06-11 08:58:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5e57c4abbbe8347b7fe097f4fb258a4f SHA-1: db0207f70791623779faaa7a5d02a8ad9dccdf77 SHA-256: ff003a82f6acfa90b2a81c4430eae39776607c03861fbbd344ca58f8f28953c3
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 0.9871

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.tw/app/431946152/free-robux-quiz-roblox-game-hack PDF link annotation
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-roblox-codes-that-work_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-hack-pubg-mobile-unlimited-uc-without-human-verification_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-non-free-models_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-hack-ohne-telefonnummer_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-roblox-game-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-get-free-robux-obby_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-coins-on-coin-master-hack_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_004_off0000504c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504C 37960 bytes
SHA-256: e6cba4d1930bb3715808d5aa023f7706af9414713b31351300a6dca0c7345155
font_01_sfnt_off0000a432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA432 18448 bytes
SHA-256: 677e4e4f16f7a1d3cc4af28704c9c96182508e21884e6236eb6ee33f14e1c870

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