Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2ab9aba088a2e0…

MALICIOUS

PDF

46.1 KB Created: 2021-06-09 10:42:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9cf912be550eea63018fedb8602ace36 SHA-1: a68a5805347f7ef0f76dc2ea6003b1eedf3570b8 SHA-256: df2ab9aba088a2e02e8b47698b6d22286067b164cc7ec0fb69223d817af1201a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'Como Hackear Perfiles De Roblox' (How to Hack Roblox Profiles), directing users to a suspicious URL. This indicates a social engineering attempt to trick users into visiting a potentially malicious site or downloading further payloads. The ML classifier also flagged this PDF as malicious with high confidence.

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.tw/app/431946152/como-hackear-perfiles-de-roblox-game-hack PDF link annotation
    • https://loba.com.vn/public/upload/files/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/krnl-download_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robux-redeem_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/get-more-robux_GM431946152.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_off00005442.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5442 26216 bytes
SHA-256: 4140fbd412bedca561bbeba00dceb645ce4bb92fc7a37aa03bff082210c44d23
font_01_sfnt_off00008ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF3 18884 bytes
SHA-256: 4fba4ee37b2a558561ac5a3fd23369d8fd606b32a020f408d00d4dfe54d7d089

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