Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f91a33e59dc1689…

MALICIOUS

PDF

33.4 KB Created: 2021-07-09 06:54:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9607cb8cdf5a0cf55541b4b733c01faa SHA-1: aa623a0433bd104c6bc200e641d0d7a62437f06b SHA-256: 5f91a33e59dc168969e11f52748aa7a555801e33484e68dce6e36807430530bb
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/406889139/coin-master-offline-hack-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-free-game-free-to-play_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-para-counter-blox-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-for-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-hack-real-no-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-army-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/can-people-hack-you-through-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-sharder_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-person_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-on-roblox-website_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-you-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-how-to-change-your-username-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_off00002ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF0 22252 bytes
SHA-256: d28fa2e1a8e8b581f32f2c9a416f86029f9d4a6b2d36d1337e5fb020d464388d
font_01_sfnt_off0000602c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602C 18080 bytes
SHA-256: 9b148c07d0dc3f850c335ec76a4603c5a5b6178ea849a51312e67b1c4b02565b

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