Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acf67b5d6dee873…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 09:55:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3a2a64f11e8acd59bea9a521cf22e070 SHA-1: d3bf44a04a06022604fd2e4a5d9e2f32175bb40c SHA-256: 0acf67b5d6dee873ed1808116d537e81ae25669fc576334243e6fca48d4f2074
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-cheat-client-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/unlimited-robux-hack-add_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-execiter-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-wallpapers_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-free-robux-for-wiewers_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-with-nothing-just-pick-amount-thats-it_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/does-roblox-give-you-free-robux-on-your-birthday_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-monster_GM406889139.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_off000033f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F2 22264 bytes
SHA-256: a52d797e93a232106f838b582dc7adf7795a48f8fbfd13c2c3254876e68ee558
font_01_sfnt_off0000654f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654F 18096 bytes
SHA-256: a995cd656f0262510fbde6104514bc63f73b186495f82817e83ff315ecbe0e31

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