Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8d7d46c5ffdc3c…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 20:20:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c7ed54c6ec254d941e11768d6687a946 SHA-1: 1346ca2f406dbf118cf782b865ca5fa41fe2a75a SHA-256: 4f8d7d46c5ffdc3c8d0f0d0ac8dd63f02fd358cc98191ac4f8dd4876ce952ca6
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 0.9980

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/how-to-really-hack-coin-master-game-hack PDF link annotation
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/change-your-skin-for-free-robux_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/hexus-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/hack-roblox-robux-reel-free-no-human-verification_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/subway-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-redwood-prison-free-swat_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/free-admin-codes-2021-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/get-free-robux-no-joke_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/robux-free-tips-apk_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/cheat-codes-roblox-reason-to-die-101_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-free-spins-2021-today_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_002_off00003116.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3116 23160 bytes
SHA-256: e239795007e8b1521cdc276eac1602c217f2959deb502571a5cc3420b64e3fed
font_01_sfnt_off0000656a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656A 18424 bytes
SHA-256: b7ec68834e62615229ce2f48e2bd5bfcb058c38ed1b5d390e0fb0719784f367f

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