Malicious PDF — malware analysis report

Static analysis result for SHA-256 77da7c35626c20c1…

MALICIOUS

PDF

39.6 KB Created: 2021-06-20 04:09:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8ff97acc60c884132949dd5be05eca80 SHA-1: 2ff694b4932d1ec259c224ae61f85f248a933cf2 SHA-256: 77da7c35626c20c1ed2d6d6c32fd41ea9bf4a54b682acdd6fa6a5ae68f23415b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and cheats, specifically mentioning Roblox and Robux, to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/roblox-promo-code-free-robux-game-hack, likely leads to a malicious site designed to exploit this lure. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious intent to redirect users to potentially harmful 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.co/app/431946152/roblox-promo-code-free-robux-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-pokemon-go-free-online_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-redeem-credit-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-ultimate-driving-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/claim-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-knives-in-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-download-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/earn-free-robux-robux-win_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/installer-roblox-hacker-sur-pc_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-hackers-tshirts-images_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-vehihicle-simulaot-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000402a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x402A 23540 bytes
SHA-256: 5491cc628b697760fec65bd70c20ae6c3d535cc4eba3fb6ff0741365ea930872
font_01_sfnt_off0000754c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754C 19380 bytes
SHA-256: 750e3ff974717f41c7c43078f7b0ff5f11fc7ec5ce9ffbf95641573defdd1d52

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