Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d22bb3c257ec4f…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 06:59:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4f338adb8b2686e95124943f7da02760 SHA-1: 394d894ed9720492cba06c4a23b20d3a99c32756 SHA-256: a3d22bb3c257ec4fa8ec198516916f7400f6ff2db2e73bfc6bd6d68e5754c458
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/how-to-make-your-own-minecraft-server-for-free-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-robuxian-awesome-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-bc-hack-download_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-btools-hack-august_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/release-boku-no-roblox-remastered-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-account-roblox-november-15-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/sound-space-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-promocode-hack-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/gain-blocks-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-generator-no-survey-or-verification_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-promo-codes-2021-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_off00003497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3497 22536 bytes
SHA-256: ed04a3035394d0da0ba189665e4e1963495d46b383da1cd2bfb36115027b46d5
font_01_sfnt_off0000664d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664D 18748 bytes
SHA-256: 1b423bc8ae820a2c2eb73a9c501cf7699a28ccef7ea595eb2009fa638697dee6

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