Malicious PDF — malware analysis report

Static analysis result for SHA-256 f03cf204759240d3…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 21:52:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a09c74e911c0fac28c888046e12de6db SHA-1: ca3df6c335adadc6aea397e8a4db7a68227d6141 SHA-256: f03cf204759240d35f21bc757a28bc1b2d63651179ec100737c1ac27c41bf4f0
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.tw/app/431946152/free-robux-hack-no-verification-game-hack PDF link annotation
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/how-did-someone-hacked-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/free-followers-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/roblox-hack-robux-ohne-handynummer_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/truco-2021-hack-robux_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/roblox-generator_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/how-to-hack-and-get-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/hitbox-expand-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/roblox-robux-hack-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/how-to-cheat-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://elearning.ma-miftahussaadah.sch.id/__statics/gudangsoal/files/code-roblox-card-free-robux_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_off000033b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B1 22096 bytes
SHA-256: c00a830def797d4e25cd1328e0f14064be8c7a94a37b8d748523c12941e1f301
font_01_sfnt_off0000647a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647A 19244 bytes
SHA-256: 96540bd7c84d60e769713d590412c745bf113fce47b0f54684cca50d2dde6ca8

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