Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8891b9f27562d2…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 16:10:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6b5a43bf46688c72ff0c79e257e54cba SHA-1: 46d5184fa29caff412f14e663b30c691ad70fca4 SHA-256: df8891b9f27562d20cbc70e57dd70cd7f3a6d88052d890fcf258fd96513e8b6d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic firing for a game hack lure, directing users to a suspicious URL. The document body also contains this URL, reinforcing the lure. While no scripts were extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a site that likely hosts malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/claim-free-robux-button-game-hack PDF link annotation
    • http://www.mathershydraulics.com.au/static/userfiles/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/how-to-get-things-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/roblox-hack-file-2021_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/roblox-hack-2021-descargar-mediafire_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/roblox-hack-stella-working_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/instant-robux_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/trigon-download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/roblox-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/is-roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/help-robloxcom-free-robux-bc-generators_GM431946152.pdfIn PDF document text
    • http://www.mathershydraulics.com.au/static/userfiles/files/free-minecraft-realms-to-join_GM479516143.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_off00003265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3265 22512 bytes
SHA-256: d57afbf82d4b1d98847c831437504992b33130cb1fdad04b320d1923cb66d2c9
font_01_sfnt_off00006452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6452 19276 bytes
SHA-256: 5ca6afd9ef6654ecee97696be31186890f5d02b6a4e0562937dffc5a9068c4b8

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