Malicious PDF — malware analysis report

Static analysis result for SHA-256 514bb23b41499735…

MALICIOUS

PDF

34.0 KB Created: 2021-06-28 00:17:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 647b21d0800f4c9a6a748ad76433afe8 SHA-1: 52d23635e4abdab30e858390d193f51132ab1b4b SHA-256: 514bb23b4149973512c6c170a0eb374fe4549b0b7335b1355d7401403f41bdac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and generators. The primary link, http://netcdn.co/app/431946152/free-roblox-griups-game-hack, is identified as a redirector to potentially malicious content. The document body and heuristics strongly suggest a phishing or scam attempt designed to drive traffic to these malicious sites.

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.co/app/431946152/free-roblox-griups-game-hack In PDF document text
    • http://bufbd.org/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/earn-rbx_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/roblox-prison-life-hack-2021_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/youtube-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/sparereborn-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/roblox-pet-simulator-jump-hack_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/roblox-robux-generator-v131-wwwwehackcom_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/hack-commands-for-roblox_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/hack-pour-roblox-apocalypse-rising_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-free-clothing-on-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
font_00_sfnt_off00002cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC9 22700 bytes
SHA-256: de64d35e66e36308fadeaab834f1f0233895719b8769388fb4f85ec12c65c787
font_01_sfnt_off00005f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9A 19084 bytes
SHA-256: 861df94aac067affc2ae08185c76e5915d9835e816dd9a91997006fac73dca25

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