Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5dd9b4df9a2a0f…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 00:32:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 25078810f2c164f0c3fc9f3ecaa3d787 SHA-1: 5cfe2a8a86d06e23b0733caacd55dbb5a71dcdf6 SHA-256: 7c5dd9b4df9a2a0f871221215757190f877bddb355859e8e8619206556a9a385
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links, including one identified as a malicious redirector, that promise free in-game currency or hacks. The primary lure is 'Free Robux Websites That Actually Work 2021', directing users to http://netcdn.tw/app/431946152/free-robux-websites-that-actually-work-2021-game-hack. This suggests a phishing or scam attempt designed to lead users to potentially malicious websites. No scripts were extracted, but the document structure and embedded URLs strongly indicate a social engineering attack.

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-websites-that-actually-work-2021-game-hack In PDF document text
    • http://library.acehresearch.org/repository/free-clothing-roblox-group_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/pokemon-go-free-pokeballs_GM1094591345.pdfIn PDF document text
    • http://library.acehresearch.org/repository/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/fire-in-free-models-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-treelands-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-doge-hat-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-codes-2021-october_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-do-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-attack-madness-hack_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_off000031af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AF 21736 bytes
SHA-256: a54eec3043238931469ee312d4d05aeddb9b771207828ac64d2058ac31b75000
font_01_sfnt_off000061bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BC 20132 bytes
SHA-256: 9d543b218f76da85b115eec436649c45a36d61030086af4e0a98f96e7e9ce1eb

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