Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7c473df96e99a4…

MALICIOUS

PDF

43.8 KB Created: 2021-06-13 19:29:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 78e25d54b231ff6b83dfa67ab5dd5379 SHA-1: 7b544890a410d9042176879ed6b072718bf27def SHA-256: 8a7c473df96e99a48590f469fc165817e739b262693c0fb92644c3836fe5a68d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and lures related to 'free Robux' and game hacks, indicating a social engineering attempt to trick users into visiting potentially malicious websites. The primary URL, http://netcdn.co/app/431946152/free-robux-23-02-2021-game-hack, is directly associated with the lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a malicious intent to redirect users to exploit kits or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-23-02-2021-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/robuxhub-net_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/pubg-uc-generator-2021_GM1330123889.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hack-para-poder-hackear-en-roblox-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-free-robux-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/play-jailbreak-for-free-without-installing-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bd2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD2 25784 bytes
SHA-256: 066d278c88f74ce32b5d4fa5a548f68a2896b0b6dfd68d742404fb34ab671057
font_01_sfnt_off000087cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CF 18588 bytes
SHA-256: 291861e821370bde34ff7372864f4c0b99e177e65c2259961dabc2ab4324cada

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