Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3f2f5c7af4f219…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 06:07:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e794495a6ce7534afbf7bb6c5cec07a8 SHA-1: f4258f32b5098ebc38f8cf48828d4f5058c96acd SHA-256: 3e3f2f5c7af4f219aa3057dc4bf8ec5ffcd666ccc1ef0d1e37fba8c0f0fec12f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary malicious URL identified is http://netcdn.tw/app/431946152/roblox-free-exploits-game-hack. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for credential harvesting or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.tw/app/431946152/roblox-free-exploits-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-free-robux-2021-august_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/daily-spin_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/descargar-hack-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-code-us_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/wurst-18-9_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-cheat-engine-download-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-free-robux-hack_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_off00002d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8A 22060 bytes
SHA-256: 742fe0792564f8681b2fdf2f59fa37bb0154dd1830c592113876dd1f36e15224
font_01_sfnt_off00005dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCE 19048 bytes
SHA-256: 043331137952d86e457d3600ea8033b41d244ed8296220d2b8f93cd13a79b2aa

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