Malicious PDF — malware analysis report

Static analysis result for SHA-256 7248035b44d49dbe…

MALICIOUS

PDF

37.7 KB Created: 2021-06-20 08:24:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 630939de783627e8d48bc9076ef8d35f SHA-1: a5d2550b10dda9dc333b7216717f36fe4fc82170 SHA-256: 7248035b44d49dbe12bbc24a419c147246171110c29c2416a34414dfb7bb4213
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering free in-game currency or cheats for popular games like Roblox and Coin Master. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent, likely to direct users to phishing sites or download further malware. The document's structure suggests it's part of a link farm designed to attract users searching for game exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-look-cool-on-roblox-free-game-hack
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/robux-hacks-2021_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/free-coin-master-spins-link_GM406889139.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-get-800-robux-for-free-nov-2021_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-how-to-get-free-robux-2021-no-hack_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/http-bit-ly-coin-master-hack_GM406889139.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-codes_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/cheats-for-dungeon-quest-on-roblox_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/redeem-roblox-cards-free-codes-2021_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/minecraft-hack-client-18-9_GM479516143.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/minecraft-wurst-client_GM479516143.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/antlers-roblox-free_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/free-lifetime-obc-roblox-accounts_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-make-a-group-on-roblox-for-free-2021_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/www-roblox-cheat-us-limite_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/google-roblox-games_GM431946152.pdf
    • https://www.roblox.com/.I
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003d10.bin
456ae94fb6b751fd13bb8a6822e1e41fc6db0df9e94bc81ea933a204a8af4bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3D10 22400 bytes
font_01_sfnt_off00006eb7.bin
6e0c72ce5859b06520f49d40566a668f2d219a2028c44bd4c3a435c2d8ef5019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB7 18984 bytes

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