Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d70e5059aeec4a6…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 10:21:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: aed28d32ae8834005bd1b5b3a085bc55 SHA-1: 7176f1cc5abfdcb349f1640eef32b69ca07ce06f SHA-256: 3d70e5059aeec4a6af061ac7da56a14ebdc0e29bee31ab3092507b35d1b10c91
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high-confidence heuristic firing for a 'GAME_HACK_REDIRECT_LURE', indicating it links to a site promising game hacks. The embedded URL 'http://netcdn.tw/app/406889139/free-spins-coin-master-2021-game-hack' directly supports this finding. The document body also contains this URL, reinforcing the lure. This suggests the primary purpose is to redirect users to a potentially malicious site.

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/406889139/free-spins-coin-master-2021-game-hack PDF link annotation
    • https://www.bathshoponline.co.uk/uploads/files/files/if-roblox-was-not-free-part-2_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/app-that-gets-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/roblox-cheat-codes-weight-lifting-simulator-3_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/roblox-bubble-gum-simulator-pet-hack_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/ciris-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/roblox-how-to-get-free-gear-2021_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/hot-to-get-free-robux-2021-may_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_off00003007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3007 22352 bytes
SHA-256: a222509a5a0a45c544c359fdc1089511f560915319616ce13c33d797e3521ce9
font_01_sfnt_off000061b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B9 18576 bytes
SHA-256: 461056571ca453647e3c969961301e9f27cf934f5ba6ca99c4dfe7c56792b440