Malicious PDF — malware analysis report

Static analysis result for SHA-256 c834f8f2f93e6f39…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 17:17:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0badb13201a93c86b80102cec5c22cb3 SHA-1: ab9f02ecd9745f8fff06a7374b9239db8d7d0247 SHA-256: c834f8f2f93e6f39c81c8717433c0c4afa9ddcef5231564bb9140cbf144904b7
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-free-food-for-pet-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/hacks-fr-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-t-shirt-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hacker-de-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/id-roblox-dress-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/can-people-hack-your-acount-on-roblox-if-you-talk_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/pet-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/dominous-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-body-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/the-day-roblox-got-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-make-shirt-in-roblox-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_off00003037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3037 22992 bytes
SHA-256: 2830cee11b062d60b4f41d0320f2bb33ec9e1b63d78e83ecfaa19a32efaeece9
font_01_sfnt_off000063bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BC 18324 bytes
SHA-256: a6873962f5bddc2cf38d0571dfc0863cc8f572ddf4d3185f76e76edba002005f

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