Malicious PDF — malware analysis report

Static analysis result for SHA-256 d84584c878f0d252…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 09:49:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: aa1adf237050657c51e52b66849e6716 SHA-1: de862543097223edb5871e949b27deb63989ffd6 SHA-256: d84584c878f0d2525d26820a52bc12195ab2e9860f67fef357fcdc2694fba60d
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are SEO-optimized pages promising game hacks and free currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm or redirection scheme. The document body and heuristics also point to lures for game hacks and password-protected archives, common tactics for distributing malware or phishing. While no scripts were explicitly extracted, the nature of the links and lures strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/how-can-you-get-free-spins-on-coin-master-game-hack PDF link annotation
    • http://library.stieyapan.ac.id//repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/como-hackear-ropa-en-roblox-de-personas_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/claim-free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pokemon-go-mod-apk-joystick-free-download_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/cheat-codes-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-free-draw-2-script_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/what-is-wurst_GM479516143.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_off0000314f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314F 22632 bytes
SHA-256: 4635efc7712631d464cae8e7eca7869f0cb25042282b5baf17c27e76cc846fc1
font_01_sfnt_off000063f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F5 18640 bytes
SHA-256: 449470805765350488004f8b4fdf00787457a3216a5e9ed79a7e676325c2cddd

Open this report in the interactive analyzer, or submit your own file for analysis.