Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ddc1d9c5d84f2a…

MALICIOUS

PDF

44.5 KB Created: 2021-06-11 11:03:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ac9544aad51f3fde51c1973925afcdad SHA-1: e0717efb7af752607629c825c14be195f4442473 SHA-256: c1ddc1d9c5d84f2a1f11192a412161e5f91ea5b4f83c6b653d0009ed42f694c6
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, masquerading as game hacks. The primary lure directs users to 'https://netcdn.tw/app/431946152/how-to-hack-lvl-in-shinobi-life-roblox-game-hack', which is associated with a critical heuristic firing for malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/how-to-hack-lvl-in-shinobi-life-roblox-game-hack In PDF document text
    • http://centr-expert.su/images/how-to-hack-back-a-roblox-accunt_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/roblox-esp-cheat-engine_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/free-robux-melissa_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/roblox-robux-hack-2021-pc_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/get-free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/what-does-ce-stand-for-the-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/roblox-free-suits_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/how-to-hack-people-in-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_off00005205.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5205 24484 bytes
SHA-256: 5a196f7258160523babd9e9bc13d15fbcde008af4ece8a044b8ff9922657b373
font_01_sfnt_off000089d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D2 18748 bytes
SHA-256: e77ab173c968f7321222c150a6fbc141e3a674e7b46546e23fbf2d231c02b7f3

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