Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d04cd68aa24d9e5…

MALICIOUS

PDF

48.5 KB Created: 2021-06-09 07:46:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1906649c2e7f2b50ca8188810d672302 SHA-1: 2f9f1613a17608834c71f148adc09954f134d927 SHA-256: 2d04cd68aa24d9e5457f79e93d07d623132d76d2f66b83899f4472d38eb306c4
82 Risk Score

Malware Insights

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

The document contains a fake CAPTCHA lure, aiming to trick the user into interacting with malicious links. The embedded URLs, such as https://netcdn.tw/app/431946152/free-gift-cars-for-roblox-game-hack, likely lead to the download of a second-stage payload or a phishing page. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-gift-cars-for-roblox-game-hack PDF link annotation
    • http://aviaprofsoyuz.info/images/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/como-hackear-cuenta-de-roblox-facil_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/2021-free-robux-windows-81_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-speed-hacks-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-troll-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-god-mod-hack_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E4 27588 bytes
SHA-256: 50a0089147cf74b81f33a55212b4ee4928a5e8a1f6015355a503ee0eecfb52df
font_01_sfnt_off00008f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3F 3120 bytes
SHA-256: 49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca
font_02_sfnt_off00009a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A52 18400 bytes
SHA-256: bbe8e50ada608f87c26f74628a031b76cc55853acaee36409a05d2e6cf9f1e70

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