Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7323d3f41ead3b…

MALICIOUS

PDF

42.3 KB Created: 2021-05-14 05:01:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 526591921bc1a53150a19b3aed59d2e9 SHA-1: ca69143c87b20e472afcbfc424b62c7df0c2e1b4 SHA-256: 1f7323d3f41ead3bc4493d7b48121fbd884ccf791d3e534dd96dcff91d172219
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document displays a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links. The embedded URL and document body text point towards a scam related to obtaining in-game currency or cheats for games like Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious, supporting the observed social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-get-robux-easy-game-hack PDF link annotation
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/www-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DF 25236 bytes
SHA-256: 53fb5b9faa9c54caa3397802bfdda2eaa0497269e16dc7dbb16575a1f2aa20eb
font_01_sfnt_off0000820a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820A 18528 bytes
SHA-256: b9e2aa841985fb83527df95ccd87a01b1af2ca35417b0d42f05b7d7a63821dbf

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