Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fef9dc49383393…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 16:28:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3489ab5f843e565daf5bd88f078b32a9 SHA-1: aa39bac10f61b800d8c9a369880bb382f0aa1de7 SHA-256: 94fef9dc49383393922f512e8c4fc3e9781aa6c4009c5eda46660f63fedf3ced
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game items. The primary link, http://netcdn.tw/app/406889139/cheats-coin-master-free-spins-and-news-game-hack, is flagged as malicious and likely serves as a gateway to further malicious content or exploits. The document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/406889139/cheats-coin-master-free-spins-and-news-game-hack In PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-cards-no-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-hack-generator-android_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-download-and-play-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-javascrip-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-roblox-servers_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/do-roblox-employees-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-hack-apk_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_off00003148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3148 22352 bytes
SHA-256: 8e1f57d8b6b1d1c8a6070cd133296266e186ac76a5bba295988f1f3efc1e9294
font_01_sfnt_off0000630f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630F 18676 bytes
SHA-256: 187c53b06c05787095bdfe0dcf94dd4e1b2ba58c8389f47ea6da0d26e0945549

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