Malicious PDF — malware analysis report

Static analysis result for SHA-256 10dd75fd498cd519…

MALICIOUS

PDF

39.9 KB Created: 2021-05-22 12:09:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c63c32f2ec994480cae13f7d847a117d SHA-1: 60c0e854eb3dd84ce9e09baee3c075fe59b79a05 SHA-256: 10dd75fd498cd5198a22eadbe2a8097d0cb1f448f0fcd00ac6d13093b9f58333
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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 https://netcdn.xyz/app/835599320/free-tiktok-video-game-hack PDF link annotation
    • http://medinup.pt/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003086.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3086 28680 bytes
SHA-256: 37290da8a056ed17cd4fd3dd56ca7dbc84c5b0c63a406fe2d94f8fa64e68611d
font_01_sfnt_off0000708e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708E 3284 bytes
SHA-256: 08634c76f2d2d32d10bcb76440c2f66c9b2439f3e1410f8511f64d9a1303c699
font_02_sfnt_off00007bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDC 17764 bytes
SHA-256: 235ab7ad76fbd6febe16a9da060cefd2b4630fdfb887c9c84e88c01a352496ee

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