Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e5fd4f8258c905…

MALICIOUS

PDF

36.5 KB Created: 2021-06-19 03:40:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bbdea16027909a969ffd9bbf92883067 SHA-1: 67ca862ac77ea2bc9817409cfcaef535dd6b362c SHA-256: 87e5fd4f8258c905cb2f6c5f0e7cf89bce0975382216334b9234e06c466985d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/how-to-make-a-free-account-on-roblox-game-hack, which is flagged as a malicious redirector. The document body, though partially corrupted, also contains this URL and other links to potentially malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-make-a-free-account-on-roblox-game-hack In PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/how-to-use-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/nuke-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-robux-present-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/roblox-character-boy-free_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/static-moonactive_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/microsoft-roblox_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-free-coins-and-spins-online-tool_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_off0000362c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x362C 22600 bytes
SHA-256: 9145c9bf75126965db343f61ce4b7009ad568e0c59732f725413483e21d4a419
font_01_sfnt_off000068ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AB 19424 bytes
SHA-256: 45f0929cbfaa58806912e4cc20c98f43ce89908b8b45761347e2b168d205bbd5

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