Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d93f6b7038c96e…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 07:48:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 97cbc5979d10c1cd21fc9455ef4d186e SHA-1: 22f53ac7609a01054d3b7f9c0948be97f0f350c9 SHA-256: 80d93f6b7038c96e04cc5806879c78b00e8e3a6f1ee51ef3167a250212bb0fe2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links and a call-to-action phrase, luring the user to click on a URL that promises game hacks. The ML classifier strongly indicates maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the links. The primary IOC is the redirector URL, which likely leads to a further stage of the attack.

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-parkour-cheats-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/how-to-become-admin-on-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-hack-no-on-roblox-email-or-no-password_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/outil-script-mad-city-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/best-gams-on-roblox-that-are-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-game-app-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-legend-of-the-fallen-kingdom-2-rpg-cheats_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
stream_002_off0000302e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x302E 22720 bytes
SHA-256: 903f83712e3d3c4f46c10788fd5f11e472f3e23b57dafa911e75fb9ab8cb9722
font_01_sfnt_off000062e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E6 19220 bytes
SHA-256: 0a0ff9d386105631a1197c3b8126bcd6f8ed16d82ac0e0bd77ce07795229fa7c

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