Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8b81d7100658c2…

MALICIOUS

PDF

44.8 KB Created: 2021-05-13 06:13:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b338865de809dc818e55c6ee86c6d1c2 SHA-1: a8010c7af02c4e809282262b178d1aa528f0e577 SHA-256: 8a8b81d7100658c2bc9bb27bb33b1dcc9e80deb9f45a5b17325c35ff79c5b959
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document displays a fake CAPTCHA or human verification prompt, a common social engineering tactic to trick users into executing malicious actions. It also contains numerous embedded URLs, including one pointing to a potential malware download, suggesting the document is a lure for further malicious activity. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/coin-master-60-spins-game-hack
    • http://ferienwohnung-walker.de/images/hack-coin-master-ios_GM406889139.pdf
    • http://ferienwohnung-walker.de/images/coin-master-free-spins-for-today_GM406889139.pdf
    • http://ferienwohnung-walker.de/images/coin-master-spin-hack-apk_GM406889139.pdf
    • http://ferienwohnung-walker.de/images/coin-master-in-app-purchase-hack_GM406889139.pdf
    • http://ferienwohnung-walker.de/images/free-roblox-accounts-2021_GM431946152.pdf
    • http://ferienwohnung-walker.de/images/mobihack-roblox-hack_GM431946152.pdf
    • http://ferienwohnung-walker.de/images/toolbox-mod_GM479516143.pdf
    • http://ferienwohnung-walker.de/images/lazy-blocks-com-free-robux_GM431946152.pdf
    • http://ferienwohnung-walker.de/images/coin-master-free-spin-codes_GM406889139.pdf
    • http://ferienwohnung-walker.de/images/coin-master-heaven-free-spins-link-2021_GM406889139.pdf
    • http://ferienwohnung-walker.de/images/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://ferienwohnung-walker.de/images/giftrobux-com-generator_GM431946152.pdf
    • http://ferienwohnung-walker.de/images/where-to-get-free-robux_GM431946152.pdf
    • http://ferienwohnung-walker.de/images/free-robux-on-phone_GM431946152.pdf
    • http://ferienwohnung-walker.de/images/8bp-hack-coin-master_GM406889139.pdf
    • http://ferienwohnung-walker.de/images/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • http://ferienwohnung-walker.de/images/minecraft-free-download-iphone_GM479516143.pdf
    • http://ferienwohnung-walker.de/images/free-game-pack-with-google-play-coin-master_GM406889139.pdf
    • http://ferienwohnung-walker.de/images/coin-master-free-coins-and-spins-blogspot_GM406889139.pdf
    • http://ferienwohnung-walker.de/images/sites-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004943.bin
490adb7ddc105001b506edae0b7a9e3ef80ed8c01dec4e7b48786d366939bf0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4943 25372 bytes
font_01_sfnt_off0000820b.bin
8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x820B 3204 bytes
font_02_sfnt_off00008d0e.bin
2be77c99efee58e2312fff3056c37fdd8f65a42446f1ebfd65b900f20d31ca7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0E 18064 bytes