Malicious PDF — malware analysis report

Static analysis result for SHA-256 705e9331deee5dec…

MALICIOUS

PDF

47.3 KB Created: 2021-06-10 19:39:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3338b60acc8865efb306d174b0e3c174 SHA-1: 7bf9fa4c4e36d5572c3e50b6aaf72f948c368873 SHA-256: 705e9331deee5dec7d4c1ffd63e2560cc888a6d1dee9fe30ba5e026d871dbb82
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 0.9769

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.tw/app/431946152/free-roblox-vip-login-game-hack PDF link annotation
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/robux-free-genorator-no-survey-or-humaan-verifaction_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/cheats-for-getting-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.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_off00005217.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5217 25512 bytes
SHA-256: 47207aa5af21836fe990078dd70f22bd5985c7145aeb6df8b978a6b44ff3c0ac
font_01_sfnt_off00008b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0D 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000094f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F7 18664 bytes
SHA-256: 71f271752f161704b0dc8f06129307e10be3ed8d1fcfd40b982c0081853f5fc1

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