Malicious PDF — malware analysis report

Static analysis result for SHA-256 668fb02de9ca1b4d…

MALICIOUS

PDF

45.7 KB Created: 2021-06-04 01:05:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 97b3f6edd066d7cb0a07e695dc6705dc SHA-1: 43219fe1ec5a5d969f63966b25045a8a0567cb39 SHA-256: 668fb02de9ca1b4d7c33ece55fe53a850f0a734bbecf1714a3d2e113db28b81a
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 the malicious URL https://netcdn.online/app/431946152/free-robux-no-verify-game-hack. This URL likely serves as a redirector to a malicious payload or phishing page. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/free-robux-no-verify-game-hack PDF link annotation
    • http://perpustakaan.urindo.ac.id/repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/tiktok-free-view-followers_GM835599320.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/minecraft-items_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/como-hackear-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
stream_004_off000052b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52B5 26540 bytes
SHA-256: d5a5556b1bc27bf00b47cdc49b74c5a79b102d620316d608cd788a62c23cdc10
font_01_sfnt_off00008fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC6 18448 bytes
SHA-256: c82a2e535d1b02ce633786be567827726fc21df48f71ae9cb05a1d9866072f5e

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