Malicious PDF — malware analysis report

Static analysis result for SHA-256 500e346e4511b883…

MALICIOUS

PDF

32.9 KB Created: 2021-07-03 18:27:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9a92fa995b40771037831825f4a39310 SHA-1: ad145571e48a0c8d18113f5384871fd4ee67cab2 SHA-256: 500e346e4511b88334510364cbafb6dc1226b0fd5b72e127fe17779e72028a10
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting it is designed to redirect users to external sites. The content, focused on game cheats and virtual currency, combined with the heuristic firings for external URIs and a link farm, indicates a lure for potentially malicious downloads or phishing. The ML classifier's high confidence score further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/i-need-robux-game-hack
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/images-of-jhon-do-hacker-roblox_GM431946152.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/tuto-comment-installer-des-hacks-pour-roblox_GM431946152.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-roblox-card-code-generator_GM431946152.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-trackid-sp006_GM431946152.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/cheat-pour-la-money-dans-roblox-phantom-forces_GM431946152.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-robux-sites-2021_GM431946152.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/what-do-points-do-in-roblox_GM431946152.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins_GM406889139.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/minecraft-handbook_GM479516143.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-spins-coin-master-legit_GM406889139.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-verification_GM431946152.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/coin-spin_GM406889139.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/com-roblox_GM431946152.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/roblox-games-com-free_GM431946152.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-deutsch-ios_GM406889139.pdf
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c89.bin
fda168d21a975d46a926e2a6a0575bc09b5557abc71f5d4ea741f2141a27b0a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C89 21892 bytes
font_01_sfnt_off00005cca.bin
781b6f361de12558180ab6156a49b669cea89b8cb2b086f0d5291a085f2ed091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCA 18728 bytes

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