Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b466fd87050d9d…

MALICIOUS

PDF

42.8 KB Created: 2021-05-12 18:43:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 577a5ec12c71ceed751e2323ce220d1b SHA-1: a7453eaf1d3021493f50b551376959c9e945d91e SHA-256: 12b466fd87050d9d6b4b80ab9244b6c10175a20232edd51b7d863e57704f075e
142 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to SEO-optimized PDF files related to game hacks and free currency. The presence of a fake CAPTCHA heuristic indicates a social engineering attempt to trick users into interacting with the document. The document likely serves as a lure to drive users to malicious websites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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/i-got-hacked-on-roblox-game-hack
    • http://somvisio.es/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://somvisio.es/images/free-account-roblox-with-robux_GM431946152.pdf
    • http://somvisio.es/images/roblox-robux-generator-2021_GM431946152.pdf
    • http://somvisio.es/images/twitter-coin-master-free-spins_GM406889139.pdf
    • http://somvisio.es/images/free-robux-no-verification-no-download_GM431946152.pdf
    • http://somvisio.es/images/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://somvisio.es/images/link-for-free-spins-on-coin-master_GM406889139.pdf
    • http://somvisio.es/images/i-cant-get-free-spins-coin-master_GM406889139.pdf
    • http://somvisio.es/images/free-robux-2021_GM431946152.pdf
    • http://somvisio.es/images/coin-master-free-spins-usa-2021_GM406889139.pdf
    • http://somvisio.es/images/earn-robux-today_GM431946152.pdf
    • http://somvisio.es/images/free-coins-coin-master_GM406889139.pdf
    • http://somvisio.es/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdf
    • http://somvisio.es/images/roblox-free-clothes-hack_GM431946152.pdf
    • http://somvisio.es/images/old-roblox-accounts-for-free_GM431946152.pdf
    • http://somvisio.es/images/100-free-spins-for-coin-master_GM406889139.pdf
    • http://somvisio.es/images/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdf
    • http://somvisio.es/images/minecraft-bedrock-edition-download-pc-free_GM479516143.pdf
    • http://somvisio.es/images/free-gold-cards-coin-master_GM406889139.pdf
    • http://somvisio.es/images/minecraft-free-school_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487e.bin
4627c32b8dacc3462374bc1344753c7f512164aff4084c2655d08b67cfe63b1d
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487E 25576 bytes
font_01_sfnt_off0000841c.bin
a8a49c36ef4b2531a5f792820ad3efe99a39c3e474aae1f279e7d577006455a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x841C 18460 bytes