Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c85c23fed6edf15…

MALICIOUS

PDF

45.4 KB Created: 2021-06-08 13:59:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 73f8d639943e41358056ac8977393491 SHA-1: 65faa281f716f6f8051b20f1825314b8fa23f74d SHA-256: 8c85c23fed6edf155849c0cf8ccd03f7405467c96f5063d9f165923303fbc2c8
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, disguised as game hack generators. The primary lure URL is https://netcdn.tw/app/431946152/hack-one-piece-millenium-roblox-game-hack. The document body and embedded URLs suggest a social engineering attempt to trick users into visiting potentially harmful sites, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/hack-one-piece-millenium-roblox-game-hack In PDF document text
    • https://ceiprevellodetoro.org/images/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/how-to-play-roblox-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/get-me-robux_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/roblox-person_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/roblox-hack-mining-simulator-rebhirt_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/coin-master-card-collection-link_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_off00004fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FBB 27256 bytes
SHA-256: cd89a25e5a7edfd2efb5df52fc14ee966a361f0d9709e00a9c8a9a7c779147ff
font_01_sfnt_off00008ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE4 19052 bytes
SHA-256: 10de7704371e3556e75fa15992f895bbd2e0e408900b2af3e552f09dca42ca8d

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