Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ca9cd9cbacf9be…

MALICIOUS

PDF

47.4 KB Created: 2021-06-11 11:50:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8e4a77b9d53ac6b23085760f32fe891b SHA-1: 97e74dd763ee7a558c9942ef066dcfbc7c2a5e49 SHA-256: 18ca9cd9cbacf9be59432dc278ed3d3382f6ea4f19a8853089863f64c6149ae7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely leading to a malicious download or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/i-love-free-robux-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/earn-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/master-coin-free_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/can-you-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-game-app-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E5 26924 bytes
SHA-256: a7457ef027a3b69372d4bc9776250e98bda239ac323da31e42715fa060e9e21b
font_01_sfnt_off00008ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE2 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000096cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CC 18128 bytes
SHA-256: e1c01b3899e000156d374071bdd86abc8b1f53619258ef67f6df2416ee22e7fe

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