Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c06d10c0d5cc743…

MALICIOUS

PDF

47.5 KB Created: 2021-06-04 03:22:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c634b137aa2d92b3b0826fb6ec6aa3c6 SHA-1: c2594f3da17210150888c4ebc66777f5e3a06767 SHA-256: 2c06d10c0d5cc743950f14be8d100b2a55f6076597873a323c2f17852a53180d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free spins' and 'game hacks', directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the PDF structure and embedded URI heuristics indicate a phishing attempt to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/get-2021-free-spins-on-coin-master-game-hack PDF link annotation
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hackcom-xyz_GM406889139.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_off00005204.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5204 25576 bytes
SHA-256: 36e4ac55eafb712b728b19e257f6b009da675c27a06c0db48896b0780a06085c
font_01_sfnt_off00008ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE4 2896 bytes
SHA-256: 98478e2fbfabd582329b6206c0d46f67523cf5e299cb16118f1065b4dd5ec6a6
font_02_sfnt_off000096cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CB 18288 bytes
SHA-256: 882c1e08e977239ecedb915e199b33d6770e962ab42e0389920a883bc9e88219

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