Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93b0bb30cf188ad…

MALICIOUS

PDF

46.1 KB Created: 2021-06-09 10:52:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b1a28a86b5782debfd9e8053b8382b2c SHA-1: d74e8a37ca091f9d7407e51e9a7dab211b3d8887 SHA-256: a93b0bb30cf188addde91f89a4f302034de83baa94eb6e6545aef4b9160ca679
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirector infrastructure, specifically disguised as game hack generators. The primary link identified is https://netcdn.tw/app/431946152/roblox-btools-hack-november-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a social engineering lure designed to redirect users to potentially harmful content, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/roblox-btools-hack-november-2021-game-hack In PDF document text
    • https://www.manmed.info:443/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/when-will-more-free-items-come-to-roblox_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-speed-hack-mobile_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/vpn-for-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/hack-de-robux-100-real-imfinitos_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-coin_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/hacks-roblox_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_004_off0000539d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x539D 25520 bytes
SHA-256: d2eb9abb1abc88cb82af332220ca2fa4072e3ee83f02ac1d81ace5fb0905ceeb
font_01_sfnt_off00008f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0F 19064 bytes
SHA-256: 5d635c81e083d3f96659d1251b911d7fb53ed648a50c2e4332bccfec99b753a0

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