Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a8b09ea38a70a3…

MALICIOUS

PDF

43.5 KB Created: 2021-05-12 01:01:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6bba27b8e75d686a27cf3eb3182e5760 SHA-1: df5d9103af7b6994f31483cfb1c6514ca9a8e0f5 SHA-256: 57a8b09ea38a70a306b60490c7eba6441a04530a6a254c02194dca7426af46d9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a prominent lure related to 'free Robux' and game hacks. The primary URL, https://netcdn.xyz/app/431946152/how-to-get-free-robux-easy-game-hack, is flagged as a redirector for game hacks. The document's structure and content strongly suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/how-to-get-free-robux-easy-game-hack PDF link annotation
    • http://opac.acehresearch.org/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/robux-game-com_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-hack-no-human-verification-or-survey_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_003_off000048e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E6 27288 bytes
SHA-256: 8e955c0b1cd9759ae65a5cb283249966ab931af628d201cee5d760fb5c942696
font_01_sfnt_off00008657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8657 18688 bytes
SHA-256: afa93f6b5b78c11c56913a3e0021d293f85f1b4278f41e2b8713ad9a89f051de

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