Malicious PDF — malware analysis report

Static analysis result for SHA-256 f834d7ad0a6fcf5f…

MALICIOUS

PDF

38.3 KB Created: 2021-05-22 10:38:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e6efca4246540c289fda6289f5904bd1 SHA-1: 18571eb39552ebe2ba546164ce18880e69ecf1ad SHA-256: f834d7ad0a6fcf5fd78771c58e2b8254812d1ec30013192f720702f4c3d4d290
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, luring users to click on a URL that promises game hacks. This URL redirects to a website hosted on netcdn.xyz, which is flagged as a game hack redirector. The document's structure and embedded links suggest it is designed to trick users into visiting potentially malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7268

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/406889139/coin-master-daily-gift-free-spins-and-coins-link-game-hack PDF link annotation
    • http://zercalo.org/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-obby-2021_GM431946152.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_off00003346.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3346 23832 bytes
SHA-256: 826aa69b425c9a0e343da844258e4e22aac6c4c8c8c87f7e54e704d663672aaa
font_01_sfnt_off00006942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6942 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000072f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F4 18652 bytes
SHA-256: 366d9c9b3cd0388843e044af578ba3ade018a9e96efb4083e0cc5bdd66e71c38

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