Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec11094805ed614…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 18:16:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5e7ab2ff775084986ebfbb39c14e2d4c SHA-1: c9691b79fe4aad8f8ac0c8ed43cd64aa99947824 SHA-256: 3ec11094805ed61445a84dd1c33083e073cd40f4c2579c810cc10c31e4153b30
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.co/app/431946152/roblox-skywars-infinite-wins-hack-game-hack PDF link annotation
    • http://battistibrothers.com/system/userfiles/files/roblox-download_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/games-that-gives-free-robux-2021-august_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-games-that-i-can-play-for-free_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-free-download-apk-android_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-roblox-accounts-with-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-god-mode-hack_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-escape-room-free-access-code_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-mm2-hack-download_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-chat-script-hack_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
font_00_sfnt_off0000310a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310A 22320 bytes
SHA-256: ff225e6a6653663efd0c58e14c14c110be9a6caabf7785454169060d44580a00
font_01_sfnt_off0000628d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 19420 bytes
SHA-256: 5ff0379d45fb777effb5dd80bb08f32db7acde2ac4a3c444ad4186495eff0147

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