Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11dfbfc50dafc84…

MALICIOUS

PDF

32.2 KB Created: 2021-07-22 15:54:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b0ec3b7eebe078bd6851e26b26514395 SHA-1: 5036f459fa986b5f17d69ddf4be77c2410bc585a SHA-256: d11dfbfc50dafc84fe3beddfb5543d6ff8afd88a55dc70828e3ddfbd47023885
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 0.9900

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/431946152/robux-free-co-game-hack PDF link annotation
    • https://www.quitthealth.com/wp-content/uploads/fsqm-files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://www.quitthealth.com/wp-content/uploads/fsqm-files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.quitthealth.com/wp-content/uploads/fsqm-files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.quitthealth.com/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://www.quitthealth.com/wp-content/uploads/fsqm-files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://www.quitthealth.com/wp-content/uploads/fsqm-files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.quitthealth.com/wp-content/uploads/fsqm-files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://www.quitthealth.com/wp-content/uploads/fsqm-files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://www.quitthealth.com/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.quitthealth.com/wp-content/uploads/fsqm-files/minecraft-dungeons-free-download_GM479516143.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_off00002cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB0 21640 bytes
SHA-256: f778dff8afb5c170a202f5eacc2226d1a0ad3061b542671ec026238b870f5a12
font_01_sfnt_off00005c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C32 18200 bytes
SHA-256: 50a8db40b3296b66d147aa340edfc40c86b84ccd1bf64d2fa2fad10f005dfcb5

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