Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8361069211bd7d9…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 09:13:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b99ca9a77acb57717506d3dacc0f2cc5 SHA-1: 7c8ac97c8b653a2f1048622660986391f26f21b6 SHA-256: f8361069211bd7d944e29a9e39db4745cce51cccd4f1271943746c749fe7a3a8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux and game hacks, directing users to the URL http://netcdn.tw/app/431946152/free-robux-2021-no-human-verification-game-hack. This URL is highly suspicious and likely leads to a phishing page or a download of malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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 http://netcdn.tw/app/431946152/free-robux-2021-no-human-verification-game-hack PDF link annotation
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/roblox-images_GM431946152.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/free-spins_GM406889139.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • https://puslitbangperhutani.com/ckfinder/userfiles/files/easypoints-gg-roblox_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
font_00_sfnt_off00002e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E79 22544 bytes
SHA-256: 24a956c462dd3c208e140c9135e419dfeb48fb3592ca33f5def29e8827ccc350
font_01_sfnt_off000060ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EC 19736 bytes
SHA-256: 415a8643b263bdb8a5e4ae51f1e0119ae52f9187a77a7c28158d674e6dc65c25

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