Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9be5b971ebaa8ad…

MALICIOUS

PDF

45.0 KB Created: 2021-06-02 09:09:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5bfa58a327f0462e64616cfaa34fef45 SHA-1: a1c9b52d958ae2c435b626e91df05e4c06d90ac1 SHA-256: d9be5b971ebaa8ada02410710effcbc11aae096c9d1d6676e38c841ba3c74af2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a malicious domain, masquerading as game hacks or generators. The ML classifier also flagged this PDF as malicious. The primary lure appears to be related to 'free Robux' or game cheats, a common social engineering tactic. No scripts were extracted, but the embedded URLs are the main indicators of malicious activity.

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.xyz/app/431946152/denisdaily-free-robux-website-game-hack In PDF document text
    • http://www.drent.se/images/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/robux-game_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/roblox-comcom_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-free-robux-2021_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
stream_004_off00004f5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5F 25484 bytes
SHA-256: 4e88ed34baa6eead18bd9dd6c21a65b3aad8370fff7da5ba1ed9ab970245df19
font_01_sfnt_off00008a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A64 19260 bytes
SHA-256: 6fd813ce909adfde08e0110d3cd2b12226cad0f3c8e46f336eec9673532d5b13

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