Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4ebee1a99838aa…

MALICIOUS

PDF

33.3 KB Created: 2021-07-04 08:10:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9db1ae45e2b1bf2e523398d1afb5d25d SHA-1: 88bf0a58b6c0361382959d4b42a92dd83effca18 SHA-256: 8a4ebee1a99838aada45ee6ef1cc24a559bd6f79402bc31c5e364aae88f34e88
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs and a high-confidence heuristic firing indicating it links to a 'free generator / game hack' redirector. The document body, though partially garbled, also contains URLs related to Roblox hacks and free Robux. This suggests the primary purpose is to lure users to malicious websites, likely for credential harvesting or to download further malware. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/robloxmatchcom-free-robux-game-hack PDF link annotation
    • http://library.sdkmaterdei.sch.id/repository/roblox-fashion-famous-vip-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/robloxwin-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/hack-para-roblox-facil_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-roblox-pikachu-accessories-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-cloth-goku-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-make-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/does-roblox-ban-people-for-hacking_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-rocitizens-cheat-engine-unlimited-money-hack_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/cheat-engine-scripts-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/hack-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/hack-para-tener-todas-las-transformaciones-de-dbr-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-speed-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/does-john-doe-actually-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-creepy-april-foools-hack-face_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-robux-ohne-handynummer-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-speed-hack-in-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/https-www-roblox-free-account_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/slurp-roblox-hack_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
font_00_sfnt_off00002c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0F 21992 bytes
SHA-256: 851b40c173c3b0d92b7e71f62300d758f5b9a982ffc0a2e1a96d79cba1f3034e
font_01_sfnt_off00005ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCC 19320 bytes
SHA-256: 0d578fc51ad0f188a9c4505a85014dba64e81475c3b1c73d40a415d6db3d1745

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