Malicious PDF — malware analysis report

Static analysis result for SHA-256 5495d4491666bc1b…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 07:08:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6870c31ccf9e5a767d18dc4f9236c96e SHA-1: b25d65db3a0f32670f3269a1fbcf888486646ee3 SHA-256: 5495d4491666bc1bdc573d010c260a984480ef58b5c3748bd8a4fa46b4989cb2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a prominent link disguised as a 'Free Robux Website Glitch' lure, which is a common tactic for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a redirector to a malicious site or a download host.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/free-robux-website-glitch-game-hack PDF link annotation
    • http://library.unissula.ac.id/fk//repository/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-cheat-tower-defense_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hacker-roblox-code_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-free-clothing-groups_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/pubg-2021-uc_GM1330123889.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-followers-on-roblox-generator_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/robux-hack-no-verification-or-survey-or-id_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-javascript-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-account-stealer-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-hack-com_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_off000030b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B0 22228 bytes
SHA-256: 7f7e1e25a66ddaa06528932bfd709cb111d58c08dc5a6a6151614a8dec46b765
font_01_sfnt_off0000621d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621D 19376 bytes
SHA-256: 0e194ebdc2c8c40b321704abcf720c745acae10e1bba27c7e55ac92b537d20b8

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