Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b05b791877df43e…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 00:47:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d1ea6ae6188b488ef3b931dd38530cb0 SHA-1: 92377d564c48514bb885b7969f0a1f9582c6ddd8 SHA-256: 3b05b791877df43e2a5e904a66dce7ad13588dfc4ccee621e003355aa2d78461
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/479516143/minecraft-free-download-linux-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/lazybux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-on-an-ipad-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-lets-party-gear-testing-speed-and-jump-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-for-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/get-free-robux-wuthout-any-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-dollhouse-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-anyone-password-on-roblox-for-free_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_off00003455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3455 22192 bytes
SHA-256: 62659807838abb73dd7e96abfde382a2f03d38e9d2656a861e6a20c0088ca1e4
font_01_sfnt_off000065b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B6 18928 bytes
SHA-256: a6d6d3b5de8a59e9ac0f8784111a009c27ee8fccd7e6d0edb578a3cd59b44339

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