Malicious PDF — malware analysis report

Static analysis result for SHA-256 887409732ea86e5b…

MALICIOUS

PDF

40.8 KB Created: 2021-05-19 21:09:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 84ca3ac2c07a5b4d453e820b08196ffd SHA-1: 28f1628d874b3b39017f92659e9bcf197952a901 SHA-256: 887409732ea86e5b514bf9c92533ea7436cb4f2f9d0b5d16ab4281691de9cf2f
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a call-to-action button, directing users to a malicious URL. This pattern suggests an attempt to trick users into downloading or executing further malicious content. The ML classifier also strongly indicated maliciousness.

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/406889139/free-spin-link-game-hack PDF link annotation
    • http://asiasieja.pl/images/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_off00004746.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4746 24544 bytes
SHA-256: 73e267825c34eec9960bdc0545f9abf39708c47061d073d1a25739b2c4441cd1
font_01_sfnt_off00007f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F69 17580 bytes
SHA-256: 3affe4290d3c586f8abc652f24a5d7e7753726cbbd633ecc9a81f23a594e743c

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