Malicious PDF — malware analysis report

Static analysis result for SHA-256 581bc5aeffc1b856…

MALICIOUS

PDF

36.8 KB Created: 2021-05-24 02:47:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a8358eba1683515d183679c98b609100 SHA-1: bc3d399ebe47cc8b8900e40c8b8638769231143b SHA-256: 581bc5aeffc1b85606e319ef46cc5c5d9336668ab8220f4fc97d1af915d9e81a
82 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a high-confidence heuristic identifying a "game hack" lure. The primary malicious URL, https://netcdn.xyz/app/479516143/is-minecraft-free-on-nintendo-switch-game-hack, is associated with this lure. Other URLs point to PDF files hosted on a suspicious domain, suggesting a chain of redirects or further malicious content. No scripts were extracted from this sample.

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/479516143/is-minecraft-free-on-nintendo-switch-game-hack PDF link annotation
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/how-to-get-free-robux-without-offers_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_off000037b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37B3 24444 bytes
SHA-256: c831234ba5e3a85aee4ca3da0522ac12789361e6732419864645f0d8bd79fa81
font_01_sfnt_off00006eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEB 18212 bytes
SHA-256: 88833f0f37aaf816a00c97530fc90e87f2df28a22611e5c00792867ae98cdb6c

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