Malicious PDF — malware analysis report

Static analysis result for SHA-256 af227391d4882bcd…

MALICIOUS

PDF

33.9 KB Created: 2021-06-20 09:45:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e880d1ae7c15405b14b36f57916c28e6 SHA-1: 0d2a60da7d253311b654e1407aa4607594ed3d70 SHA-256: af227391d4882bcd050a743befbc8a144841dd0e9971d4a756c21f0dcdc27a9f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or cheats. The primary lure URL is http://netcdn.co/app/431946152/roblox-cheat-unknwocnehats-game-hack, which is flagged as a malicious redirector. The presence of a visual download button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-cheat-unknwocnehats-game-hack In PDF document text
    • http://learningarabic.co.uk/images/game-toolbox_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/cheat-engine-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/robux-2021_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/roblox-hack-menu-jailbreak-2021-abril_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/robux-survey_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-get-free-robux-without-downloading-any-apps_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_off00002e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9F 22116 bytes
SHA-256: 0f5bcb4d428fa8528e72bcd8b07d38b18df880fd9dd07afcbd304b7a875e1e81
font_01_sfnt_off00005f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F33 19088 bytes
SHA-256: bc6f9d3e6ef51f76bb3a3b5e3dfbea45752c0afbc9ac00cd5ab59e299542549f

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