Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a354c25c2cd2fd0…

MALICIOUS

PDF

45.7 KB Created: 2021-05-14 10:35:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2f57756739a9bd2c1824dbff1e016605 SHA-1: 22bcbb822910a111beaae315fb69afcea642f946 SHA-256: 2a354c25c2cd2fd0b6055574873716167acd90464d810b06d252a5ae1c0d9206
82 Risk Score

Malware Insights

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

The document contains a fake CAPTCHA lure, designed to trick users into interacting with it. It also embeds external URLs, one of which is associated with a Robux generator, suggesting a scam or malware distribution attempt. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/431946152/robux-generator-without-verification-game-hack
    • http://lechia-sedziszow.pl/images/minecraft-hacked-client_GM479516143.pdf
    • http://lechia-sedziszow.pl/images/coin-master-free-spins-may-11-2021_GM406889139.pdf
    • http://lechia-sedziszow.pl/images/300-daily-free-spins-coin-master_GM406889139.pdf
    • http://lechia-sedziszow.pl/images/minecraft-free-download-laptop_GM479516143.pdf
    • http://lechia-sedziszow.pl/images/cute-free-hair-on-roblox_GM431946152.pdf
    • http://lechia-sedziszow.pl/images/free-robux-com-no-verification_GM431946152.pdf
    • http://lechia-sedziszow.pl/images/coin-master-hack-2021_GM406889139.pdf
    • http://lechia-sedziszow.pl/images/coin-master-hack-without-human-verification-india_GM406889139.pdf
    • http://lechia-sedziszow.pl/images/free-robux-link_GM431946152.pdf
    • http://lechia-sedziszow.pl/images/robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://lechia-sedziszow.pl/images/coin-master-daily_GM406889139.pdf
    • http://lechia-sedziszow.pl/images/coin-master-hack-no-human-verification_GM406889139.pdf
    • http://lechia-sedziszow.pl/images/robloxbux-us-generator_GM431946152.pdf
    • http://lechia-sedziszow.pl/images/roblox-character-free_GM431946152.pdf
    • http://lechia-sedziszow.pl/images/free-spin-and-coin-links_GM406889139.pdf
    • http://lechia-sedziszow.pl/images/how-many-levels-are-in-coin-master_GM406889139.pdf
    • http://lechia-sedziszow.pl/images/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://lechia-sedziszow.pl/images/get-free-robux-info_GM431946152.pdf
    • http://lechia-sedziszow.pl/images/how-to-get-more-robux-for-free_GM431946152.pdf
    • http://lechia-sedziszow.pl/images/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000496c.bin
296e0cd44ef48f62a222d0d132fda9ed848f61e6f8fcb0ac720d39b89300043d
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496C 25612 bytes
font_01_sfnt_off000084d3.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x84D3 2824 bytes
font_02_sfnt_off00008e82.bin
7a1699424a486bcfa4df415b867af9f99e06be81e984b6abcb7de7a1603b39ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E82 18800 bytes