Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91eaa66108bd3af…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 08:43:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 08efd5ae63ea50ab9b29c227750a68ad SHA-1: c4414fccc1314bafdbb666d4d72979a2214656e4 SHA-256: e91eaa66108bd3af9255b65990a61e92bd2607edc1a7e9ace53ecc54ddb16607
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to a known malicious redirector infrastructure at `https://netcdn.online/app/431946152/free-robux-earn-game-hack`. The document body and heuristics suggest a lure for game hacks or free currency, likely leading to a download of a second-stage payload. The presence of embedded URLs and the nature of the lures indicate a phishing or social engineering attack.

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.online/app/431946152/free-robux-earn-game-hack In PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/robux-offers_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-free-spins-link_GM406889139.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_off0000542a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x542A 25772 bytes
SHA-256: b248bbfe0540caccb5b395ebc3e17fe66b26d3d45888ddf773cf78057897fe1e
font_01_sfnt_off00008db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB0 18244 bytes
SHA-256: b6014a1bf70a80b5b7176295bd11553985cf3fccea183fb301f46a2e8db4226f

Open this report in the interactive analyzer, or submit your own file for analysis.