Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e25366fbcf03be6…

MALICIOUS

PDF

39.7 KB Created: 2021-05-10 17:05:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 0e159170fc730601ce96a2d1b9631785 SHA-1: 55c29cdfcf9b5096e253bcae4f700a522d37122d SHA-256: 0e25366fbcf03be653e03c61d63116794fd60d928c28d7e1d998f480929b631e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting 'free Robux' and game hacks. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-no-apps-game-hack. The document's content and heuristics strongly indicate a phishing or scam attempt designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-robux-no-apps-game-hack In PDF document text
    • http://www.rezbb.sk/images/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://www.rezbb.sk/images/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://www.rezbb.sk/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://www.rezbb.sk/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/daily-spin_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/free-robux-net_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_off00004088.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4088 24644 bytes
SHA-256: b6e3f467d296aa28af0dc5d791cb2fad125898887b0bb975fab0f657ac0cc4d6
font_01_sfnt_off00007921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7921 18192 bytes
SHA-256: dd781f2eaffddff6619a7729b763fabd5b8c4a088eef07f4c149f41bf202d502

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