Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f229e61b1e80dea…

MALICIOUS

PDF

32.2 KB Created: 2021-07-20 01:12:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 20a061034665383b1c4ff8f22385c1f4 SHA-1: 6a4dbcae90914e02cfe4c6b774b6587d5d9aa060 SHA-256: 8f229e61b1e80dea0c6ab5ab4439b7e801fab30dbd2e599467a99da2eff86b87
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as 'free generator / game hack' lures. The document body and embedded URLs suggest a social engineering attempt to trick users into downloading potentially unwanted or malicious software. No scripts were extracted from this sample, but the presence of malicious links and the ML classifier output strongly indicate a malicious intent.

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/431946152/get-free-robux-generator-game-hack In PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-earn-free-robux_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_off00002a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A56 22124 bytes
SHA-256: d3e786ff07a6d0b2f6fcbdc178d72968497be9437144ab69d14635d8274d9a05
font_01_sfnt_off00005b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B02 18532 bytes
SHA-256: 04524bbcb7abe512e5bde8c6adfbb0fa42162699e1a2e435870ca10e72761930

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