Malicious PDF — malware analysis report

Static analysis result for SHA-256 e321b577d3065191…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 12:20:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 828c7da1b41506fcccef5b2a06427a4c SHA-1: 4170304bd0e55b84114f01dfb04bce2dae82ade7 SHA-256: e321b577d3065191701019d029fa165a6937bccac3aa7408f2717e17b37f8b3b
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/free-spin-hack-coin-master-2021-game-hack PDF link annotation
    • http://digilib-pps.unja.ac.id/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/best-hack-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-tycoons-on-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-invitations-free_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-the-2nd-player-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hack-blox-piece-roblox-give-mod-menu_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-hack-genwrator_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/birmungham-airport-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/account-hacking-software-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/natevang-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-pc-game-free-download_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
stream_002_off00002f3e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F3E 22412 bytes
SHA-256: 55b8788f31327a066c59f72c7db278edc0f43287f23ad6dcb59f1e88a6943986
font_01_sfnt_off00006166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6166 18748 bytes
SHA-256: 7df8ab728cdded3f8099f37aff2fc644c0b56c156b14cd18fe44a93e03dbf9eb

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