Malicious PDF — malware analysis report

Static analysis result for SHA-256 da687e9025863b18…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 10:18:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 64564bce50993d82305cf4c7f88e9c85 SHA-1: 6841f5e2e6509547bedf97e48bc87fd3fa19491b SHA-256: da687e9025863b18285726bfd95ad74625ae054765b24b04dd877b908d748f3e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to game-related content, suggesting a link farm or phishing lure. The presence of a fake CAPTCHA prompt further indicates a malicious intent to trick users into interacting with these links. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-log-out-of-coin-master-game-hack PDF link annotation
    • https://senvoigiatot.com/public/upload/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/robux-match_GM431946152.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004897.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4897 25656 bytes
SHA-256: 36a545c452b39431e7b3886d9f2bd0fcf80d6a4eb041c339019b3f499ea20d9c
font_01_sfnt_off0000844e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844E 18140 bytes
SHA-256: 3138221b31ed8b6406c0e26913c361d842eb1c4d2714b685327af50e84741aa0

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