Malicious PDF — malware analysis report

Static analysis result for SHA-256 458c566e38730dc3…

MALICIOUS

PDF

44.6 KB Created: 2021-06-08 19:21:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6bb6b21c8b6364b77f3b1680120dca81 SHA-1: 7834bf9b9a09cdb357f2a228e32af4d5322d3527 SHA-256: 458c566e38730dc398e16a900af6d4ad26dc024f58321a26c08eefcf1eaae2a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, such as 'kill-script-roblox-hack-game-hack'. These links are designed to lead users to potentially harmful websites. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/kill-script-roblox-hack-game-hack In PDF document text
    • http://lamascheradiferro.dk/images/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-tiktok-famous-for-free_GM835599320.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/teleport-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/pubg-uc-indonesia_GM1330123889.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-websites-2021_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_004_off00005100.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5100 25052 bytes
SHA-256: bb9fd905b48776c4d44972e41d38e3d331c23688cdab5a2c60e744f39d2ef510
font_01_sfnt_off00008ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC2 18580 bytes
SHA-256: 9508ac0ceef434955451d228cfb3da2944ad2cd0c019827e83c0ee801f04e034

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