Malicious PDF — malware analysis report

Static analysis result for SHA-256 db873f8d91ae69a5…

MALICIOUS

PDF

34.2 KB Created: 2021-07-01 19:55:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e1c1d5e1bd51340ec570dedcc74efb9a SHA-1: f63e3828e4ebe7d8b49a40f003903cf5f67b95ae SHA-256: db873f8d91ae69a5f3c2d23f125426c739706be4a4f35e0c3d4e4a615ee9a532
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body text and heuristics indicate a lure for game hacks or generators, specifically targeting Roblox and Coin Master. The primary link, http://netcdn.co/app/431946152/roblox-snippet-hack-game-hack, is associated with malicious redirector infrastructure, suggesting the document's purpose is to lead users to potentially harmful websites.

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/roblox-snippet-hack-game-hack In PDF document text
    • http://library.yamasi.ac.id//repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-sword-gear_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/who-hacked-my-main-group-chat-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-shorts-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-fhantom-forces-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-money-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-roblox-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-roblox-and-get-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_off00002dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFC 22472 bytes
SHA-256: d9ae5796efe8c2cf83f527bbb9fa1a3084206b5c911ca783568bf9b9cd508760
font_01_sfnt_off00006052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6052 19056 bytes
SHA-256: 148a8110e4c3d7e0814106c716ae57661f7c3012b08f3f9436fa9fb6261bd78b

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