Malicious PDF — malware analysis report

Static analysis result for SHA-256 da387968cc2fd9ff…

MALICIOUS

PDF

37.8 KB Created: 2021-07-05 20:44:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 136a1a4f790c1424dd4e40044ca4aa17 SHA-1: 70f7a94e2295eedc9727eb99b9af9e8e57ffd96c SHA-256: da387968cc2fd9ff4a8c5a40d1d4d570f5dd18391b06b100db55b120c29b440e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text referencing 'free Robux' and game hacks, aiming to trick users into clicking through to malicious sites. The primary lure URL is http://netcdn.tw/app/431946152/free-robux-kid-friendly-no-human-verification-game-hack. While no scripts were directly extracted, the PDF structure and embedded URIs suggest a social engineering attack to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.tw/app/431946152/free-robux-kid-friendly-no-human-verification-game-hack PDF link annotation
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-donloaden-free_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/is-there-a-real-way-to-earn-robux-for-free_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/secret-hack-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/fray-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/rmc-free-roblox-aimbot-download_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/promo-codes-for-free-stuff-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-hack-in-roblox-jailbreak-speed_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/game-on-roblox-where-you-protect-computers-from-being-hacked_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-hack-roblox-accounts-2021-agust_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/adopt-me-roblox-hack-place_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/dungeon-quest-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/freerobuxgenerator-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/hacks-for-boku-no-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/dragon-ball-z-final-stand-free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/jouer-avec-manette-free-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/get-free-cards-coin-master_GM406889139.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_off00003817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3817 23512 bytes
SHA-256: 61ac2a003bc587fd90570fd61f24f32fdc3f8f74e0ff762f8fac8735bd94a01e
font_01_sfnt_off00006d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0B 19760 bytes
SHA-256: 81aab0412cfb0a87b1895216bf4af503bb533c0e0c6228ebd3d86b300273636c

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