Malicious PDF — malware analysis report

Static analysis result for SHA-256 3820cf43578ddaf4…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 05:32:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d249b0aa418fb526afcfa9f9e06d8a3f SHA-1: b49b88ec1c6123b39b5419aa0ce2c1b932cfb908 SHA-256: 3820cf43578ddaf47513282214d185e0baa7147e51a014c6a101b1b2729b5e1d
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/wurst-commands-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-100-real_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-apk-hack-mega_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-girl-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-one-piece-legendary-mellee-hacks_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-hack-uk_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-skin-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-do-you-hack-your-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-xenox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-developer-console-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-tablet-cheats_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/simon-says-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-without-downloading-anything_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_off00002ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC9 22584 bytes
SHA-256: e1dbf817c246d5184aaa530f0b3f12fb39fc13cf5df3e44571ccc9233e17c37c
font_01_sfnt_off000060c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C4 18652 bytes
SHA-256: 2aa4b3a06f8f810455c2de55047681fbe1f4f7c5efd97b9b8db0efc9e0a5a8f6

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