Malicious PDF — malware analysis report

Static analysis result for SHA-256 371360ff52ae5374…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 11:13:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e7075d89b1bfa3ba3cb6e53aa878d268 SHA-1: 0aa8d33b35f175b95bef562c6199546ae76be630 SHA-256: 371360ff52ae53746b12568cfa4355877ebf5e6c96bfe72cafcb264b61154c70
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded links, many of which are SEO-optimized and point to external resources related to game hacks and free in-game currency. The presence of a "download" button lure further suggests an attempt to trick users into downloading unwanted or malicious files. The ML classifier also flagged this PDF as malicious with a high confidence score.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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 https://netcdn.online/app/431946152/roblox-script-hacks-game-hack
    • http://digilibfisip.unla.ac.id/repository/free-robux-discord_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/roblox-t-shirt-free_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/websites-to-get-free-robux_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/get-free-coin-master-coins_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/spin-and-coin_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-get-roebucks-in-roblox_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-minecraft-pe_GM479516143.pdf
    • http://digilibfisip.unla.ac.id/repository/free-robux-hack_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/free-roblox-com_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/pubg-uc-quora_GM1330123889.pdf
    • http://digilibfisip.unla.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/hack-coin-master-using-cheat-engine_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/descargar-coin-master-hackeado_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/minecraft-free-download-mac-full-version_GM479516143.pdf
    • http://digilibfisip.unla.ac.id/repository/minecraft-cheats-pc-2021_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ee6.bin
70332ae06ea4860930ffc4153ea8ca00c6e8485ca72ab7d67f1d6c1f58b7959b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE6 24644 bytes
font_01_sfnt_off00008721.bin
e0a0e7499c3dd10c5114bd1538d6e258e6cb3acdd4f79d9538668087a4bdd2cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8721 2892 bytes
font_02_sfnt_off0000910a.bin
535ec4be0d2657e9981f9200dcc4c4c41f6589372ce54f218017d5d6a2e1f0f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910A 18580 bytes

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