Malicious PDF — malware analysis report

Static analysis result for SHA-256 4283e04671ae428f…

MALICIOUS

PDF

44.9 KB Created: 2021-06-09 09:58:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f3763adbb8939a4c7a8c023352e438e6 SHA-1: bf3094b9f5e361fec56b8db2311a64e685c65a28 SHA-256: 4283e04671ae428fb0c3203ac2b633cecd56a6694ef8717d60b43aff0a82a266
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The heuristic firings indicate that these links are associated with malicious redirectors and a lure for game-related cheats. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, likely leading to a phishing or malware download site.

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-get-a-bunch-of-free-robux-game-hack In PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-games-at-roblox-download_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/minecraft-free-minecoins_GM479516143.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
stream_004_off00005186.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5186 25408 bytes
SHA-256: d269712012eaf2a8678e1d1f6d5f59a29759f18d461fcca1c914dedab683bb31
font_01_sfnt_off00008ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA3 18448 bytes
SHA-256: c2307beb365399aaf815a8119bb443d0d0701f2b771f0fa76e2bd17f2d6b95b4

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