Malicious PDF — malware analysis report

Static analysis result for SHA-256 4680288677d718cd…

MALICIOUS

PDF

37.6 KB Created: 2021-05-20 17:48:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b589b91d2cdba7dd5da57d0edd49ff42 SHA-1: 7197c7e4528395d4ba7ab5f8a29d8992e48aba04 SHA-256: 4680288677d718cde81ff8a78aaaeb6868da629ae3f4977e8d3bac2849acdabb
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 0.9447

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/431946152/is-roblox-hacked-game-hack PDF link annotation
    • http://niceviaapia.com.br/images/ckfinder/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/www-roblox-com-free-robux_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
stream_002_off00003106.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3106 27992 bytes
SHA-256: f9ca59372251bb8d3b501e3a89503aa755752655ee928849e007a9bdd63c1172
font_01_sfnt_off0000716f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716F 18356 bytes
SHA-256: 0354344844298af16afd5a2e6ef08903fcba0fe1bf138aeb333889556374cdd5

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