Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91cdf1e60acad46…

MALICIOUS

PDF

35.8 KB Created: 2021-06-20 02:42:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fd25149333469b80489f4db43cfb8734 SHA-1: aa273bbdd54be28b8739010a28cc19f865f3a912 SHA-256: e91cdf1e60acad46049e82d96d5a098e03f670a507c59a3a35ef230c11e0f932
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.co/app/431946152/roblox-hack-account-free-game-hack PDF link annotation
    • http://digilib.pustaka.unand.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/big-brother-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-how-to-make-free-shirts_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-limited-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-no-steps_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-cards-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/cheat-roblox-lumber-tycoon-2-indonesia_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/download-free-cool-roblox-boy-outfits_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-clothes-roblox-groups_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-skywars-how-to-get-free-coins_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/descargar-roblox-hack-robux-infinito_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/hey-you-yes-you-do-you-want-free-unlimted-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-tiktok-followers-no-downloads_GM835599320.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_off00003438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3438 22792 bytes
SHA-256: 112315232ecc327a397abac6f607810ffc5628101df67501edcb8733c714236e
font_01_sfnt_off0000672b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672B 19064 bytes
SHA-256: d0143f8b586498ab38c2ef8d963b82995c39a37c6a8185e7d9929fbc5aa1e7af

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