Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e8ba1ac9d3b9cf…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 13:42:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 42c08a02f127f3ddf53ee1c5f31b64e4 SHA-1: 5bedd99b5c43c8bfaa6b005fb126eafc30ce50bf SHA-256: 55e8ba1ac9d3b9cf1de4ac8d30e9cf54f9ef6c535be34f140634f19fe3fd0cc3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a common lure of free game currency and hacks to trick users into visiting malicious websites. The primary link directs to `https://netcdn.xyz/app/406889139/coin-master-hack-root-game-hack`, which is flagged as a malicious redirector. The document also contains numerous other links to similar game-related lures hosted on `dmgroupksa.com`, suggesting a campaign distributing potentially harmful content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-hack-root-game-hack In PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/roblox-hax_GM431946152.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/how-can-u-get-free-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
stream_003_off00004cd3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CD3 24836 bytes
SHA-256: 4243ee1e30bb2350710404cfea297edb55b5dea8fa0044c7cfb498b42ccd3b5b
font_01_sfnt_off000084b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B5 17716 bytes
SHA-256: 1caeca20eb7b531e957ca6f618ca954c404f41c3b516abc25a21f96e81028257

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