Malicious PDF — malware analysis report

Static analysis result for SHA-256 da088cd4daa2381f…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 08:33:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b7126f6cc007ff421f4bb44e14b698ed SHA-1: 743c72d054437b0e1c0a2f49f08301db70d360b0 SHA-256: da088cd4daa2381fde46b02af75c55b05917958645d5d13f0818e87c67fd2bc9
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-link-2021-today-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-202100-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/blox-rewards_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-create-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-accounts-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-skywars-coin-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-with-guddinfo_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/tiktok-free-books-website_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-do-you-get-free-robux-on-roblox-wihtout-paying_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/great-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/get-robux-free-today_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/watch-ads-for-robux_GM431946152.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
font_00_sfnt_off0000320a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320A 22516 bytes
SHA-256: ddea2a953b5419295516b1ba423a15deec617fe697734cd77ab6d0e1d11ab7ec
font_01_sfnt_off00006442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6442 19100 bytes
SHA-256: de35a114d8e8c4fc4d70d52a756b20ceb128d757b6ef9e01fa5e276a673837de

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