Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee6882b9c0d8bc8…

MALICIOUS

PDF

44.8 KB Created: 2021-05-15 17:15:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: de1aa5abbec9766385417801a38fa2c4 SHA-1: d15a3a90be849824e1d072d8c3f8bec6b31da767 SHA-256: 4ee6882b9c0d8bc82dfe28f0a859ce9c194f5e97adca5fd709d4363273da70ae
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. It also features a large number of external links, many of which point to SEO-optimized PDF files related to game hacks and free currency, suggesting a link farm or content-spinning operation. The primary URL, https://netcdn.xyz/app/406889139/hackear-juego-coin-master-game-hack, likely serves as a landing page or initial download point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/hackear-juego-coin-master-game-hack
    • http://himalayandiscoverytrek.com/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-spins-hack-2021_GM406889139.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-net_GM431946152.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-new-link-free-spin_GM406889139.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/hackear-coin-master_GM406889139.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-ftw_GM431946152.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/robux-com-roblox_GM431946152.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/minecraft-windows-10-free-code_GM479516143.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-hack-2021_GM406889139.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/freerobux-hack-us_GM431946152.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-with-no-verification_GM431946152.pdf
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-links-for-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049a5.bin
fe239dd1dc41c90f096e2915ce791f0596d42dcf35bb6f5bbae751306e9b3752		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A5 24752 bytes
font_01_sfnt_off00008277.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8277 2880 bytes
font_02_sfnt_off00008c62.bin
85adf4a15c24233f1c93bca6a3c18238941d111dac195f6ddf82d6394f744ad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C62 18308 bytes

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