Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eca5a191f2f94ce…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 21:26:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 77718063251d65f81c0e1772010692f0 SHA-1: 4fbfeb105fdc3dd6cdc3210d7c15a66ce73f2962 SHA-256: 6eca5a191f2f94ce7f16f6ab16f0c6aa3299bf6c325a4fa3664c3e1ae03113cb
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 0.9981

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-how-to-get-free-pet-food-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-future-tycoon-money-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-live-stream-giveaway_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-digimon-aurity-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/comoponerse-hacks-en-roblox_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/roblox-toll-free-number_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-name-change-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/compile-roblox-hack-dll_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/get-robux-for-fre_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-cheat-codes-for-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-cheat-in-roblox-get-eaten_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_off000033e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E3 22752 bytes
SHA-256: 90fc78fb3ecd3a94c225dfd079e2ae155d6ee59ebc0141d40217484a47f8dd1a
font_01_sfnt_off000066e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E3 18492 bytes
SHA-256: 00f7e27725960740982393975f85afd719e37a0a3f01386c53951882e6753ccc

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