Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9242adbc4845fd…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 02:03:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b7a5d5d7e8d7d332e75bb78b6914418a SHA-1: b991b48fc5722e3b84a4db888ffc02c5fabf4107 SHA-256: 9f9242adbc4845fd4b598584331c5f406d24c7e71cf8e21c576d5711848ac9c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains lures for free Robux and game hacks, directing users to download an application from the URL http://netcdn.tw/app/431946152/free-robux-earn-game-hack. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and embedded URLs supports a phishing or social engineering attack pattern. No scripts were extracted from this sample.

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/free-robux-earn-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/hack-a-game_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coins-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-hack-on-desktop_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-unlimited-money-hack-jailbreak_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000320d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320D 22928 bytes
SHA-256: 014fabd3a2c47ac5689848e98876ea1678ec9cc0d37a01b7ecf3752365771402
font_01_sfnt_off0000658f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658F 18716 bytes
SHA-256: d0fd5caa07bd2994d5aead91e3f120989a872bbf6995ac2693ef7a49b18a3472

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