Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e5190169a9fa5a…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 05:33:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 911f109419ae5df0a3c10553c60aa77d SHA-1: cc9706b4083bae751bc88c11a09c6e1de68a3316 SHA-256: 71e5190169a9fa5acf2ac34437fde3383dea2deac7cf3138d1c66c4a43f44267
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9865

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/coin-master-free-spins-link-2021-march-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/tiktok-par-free-followers-kaise-badhaye_GM835599320.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-and-coins-daily-links_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_off0000524d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x524D 25404 bytes
SHA-256: 91ee59e4bdc7b22bc41932a29cf39f5c6be06fd018786fef432c3beec4f5e274
font_01_sfnt_off00008cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF6 18624 bytes
SHA-256: 161e7b6ed1025749db9d27ab8af43de18d614588b68a514ec7b342862811dbc4

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