Malicious PDF — malware analysis report

Static analysis result for SHA-256 167b271d58b18ce4…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 10:36:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c583abfbd5a0419a57d9035dcf84ba0a SHA-1: 54ea7262d2abbf0515695b3b9709b5ecdfae7105 SHA-256: 167b271d58b18ce4b6090809ba755139f1cff8482ae115719a1af34f189e243f
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 0.9832

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/431946152/hack-de-10000-robux-en-2021-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/pubg-uc-shop-myanmar_GM1330123889.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-denis-roblox-acc_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/blogger-coin-master-free-spins_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_off00004e07.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E07 29860 bytes
SHA-256: 481d69261008e39e5502317492e83e7af55409851d0a82c373e363b0fb4794a8
font_01_sfnt_off00009495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9495 18820 bytes
SHA-256: 1364d4afbafb1a36b7fc7c1bef87786f25f47ba3c0274edac702e9f538ed24cd

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