Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9e8e386e5f4cfa…

MALICIOUS

PDF

32.4 KB Created: 2021-07-19 12:49:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 40ce344eec27c3af12f372f58fd81aeb SHA-1: 153acb246967a385f90af683d4f1d2658e4e7f3d SHA-256: cd9e8e386e5f4cfa9a0862f24142d08a6858c9b382ed51b0a8e8958bb16ec030
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The document body explicitly contains the URL http://netcdn.tw/app/479516143/free-minecraft-codes-game-hack, which is also flagged by heuristics as a malicious redirector. The presence of multiple similar URLs suggests a phishing or scam campaign aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/479516143/free-minecraft-codes-game-hack In PDF document text
    • https://serviio.org/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://serviio.org/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://serviio.org/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://serviio.org/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://serviio.org/images/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://serviio.org/images/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://serviio.org/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://serviio.org/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://serviio.org/images/coin-master-free-spin-and-coins-links-2021_GM406889139.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_off00002d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D65 21980 bytes
SHA-256: cf164ca2385fc09c247c90b992f22c1177b52bdce1c9c1f2c2ae9e720585945a
font_01_sfnt_off00005dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFC 17884 bytes
SHA-256: ca0982e5699fcbbad1c272e9f6df792bd17b0fef580afa6f1747d77cedc77eee

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