Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e596f37f85208b…

MALICIOUS

PDF

46.7 KB Created: 2021-05-14 11:36:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 45588eb9aa08e9e0160a306dc34ad913 SHA-1: 7aabcda94a5c179a195b1565f9769371e2be91e9 SHA-256: 84e596f37f85208bf8dec87c35aae3f6b44fc15c088ffdf494836a4fd75e214a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at `https://netcdn.xyz/app/431946152/robux-premium-game-hack`. The heuristics indicate that the document is designed as a lure for game hacks or generators, and it also contains a visual call-to-action button. No scripts were extracted, but the presence of embedded URLs and the lure content strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/robux-premium-game-hack In PDF document text
    • http://karldall.dk/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://karldall.dk/images/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://karldall.dk/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004952.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4952 26416 bytes
SHA-256: bc07ba463261add139d1f8d8c9a7995ed84201d16b93db4a85af7b9ce19038a0
font_01_sfnt_off000086d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D2 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000093e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E4 18384 bytes
SHA-256: 177267aa0ce1c90065d8421ade4190e52cdc6c4cb76b2453afd409bcd911e8d4

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