Malicious PDF — malware analysis report

Static analysis result for SHA-256 534e74e44d4fb3e0…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 09:55:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 064f8a55a371b0b7f195072469dcdd91 SHA-1: e9d61a987fe8c695816104105dedd9f980861d2d SHA-256: 534e74e44d4fb3e08a6d646cb3ccc8ce490105dae4873fe9ed2e5df067cb5391
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 0.9797

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/coin-master-3533-android-hack-game-hack PDF link annotation
    • http://library.fk.upnvj.ac.id/repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/welcome-to-robloxwin-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-spins-on-coin-master_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_off00004e13.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E13 24804 bytes
SHA-256: df3b37c9c71400d84ecb6e527def35191f7aacdfca3c5916b65fc7143bc9cbbc
font_01_sfnt_off000085d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D2 2980 bytes
SHA-256: 02d7b9f6726bccd8a8efb6fbeb8471cfa0512389db98a07916ae2068abafdbc8
font_02_sfnt_off00009028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9028 18196 bytes
SHA-256: dcb33034cc58ce1217dbd5b6274ede2fc62df16ef41450d00994050c1588cc7c

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