Malicious PDF — malware analysis report

Static analysis result for SHA-256 796673ca2af9c2db…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 12:20:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2dcff33cb8e5a6470a39ef11a2246a1a SHA-1: 1140d0456d9ef4c7984d50dcba5e047e706f915e SHA-256: 796673ca2af9c2dbacee981e4cd157b590d8b2a4dcfba7d607753b5a3dbebc8d
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.online/app/406889139/free-spin-coin-master-link-download-game-hack PDF link annotation
    • http://libnh.stikesnh.ac.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-without-doing-anything_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_off00005311.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5311 25500 bytes
SHA-256: 69283f6969561f1af18621eca8001f91de44946f50be492a68deff3ff1ebb924
font_01_sfnt_off00008d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D32 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000096e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96E5 18636 bytes
SHA-256: 136b79965a5248ac6e7935dc786215b4277752963c3c0798ae07969220183c9d

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