Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb83b3ad9937247…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 15:32:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 02a147d30c609977861baee6c8695608 SHA-1: 8c4533eea7e0e6e87e2c5677cc0ac492f902d18a SHA-256: abb83b3ad9937247ef59b6da91cd0bd8b3e5ebeffcd8364118a97754aa9d9267
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of 'free Robux' and 'game hacks'. The primary malicious link identified is https://netcdn.online/app/431946152/free-robux-no-verification-2021-game-hack. This suggests the document is designed to lead users to potentially harmful websites, likely for phishing or malware distribution.

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-no-verification-2021-game-hack In PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master--hack_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/pubg-uc-top-up-center_GM1330123889.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/download-coin-master-hack_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
font_00_sfnt_off00005035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5035 24880 bytes
SHA-256: 3a2fc332e744a2032b88c0f2d927c1a800cf63b3244c7c9245305fff69e01a4e
font_01_sfnt_off00008841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8841 19004 bytes
SHA-256: d712ae43aec968503a6d4b8ef93db90b07e4d7d9799b66e9787cf09d99ae12e2

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