Malicious PDF — malware analysis report

Static analysis result for SHA-256 3784c81904db163c…

MALICIOUS

PDF

35.9 KB Created: 2021-06-29 23:32:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6f42fdb327002668e2c96440169e2ace SHA-1: fd59f174e1f085de55f6886f946901a8ef0390f6 SHA-256: 3784c81904db163c52d29f33b18c5d754ba8e02ffe0444bae40539904c5b5c4d
182 Risk Score

Malware Insights

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

This PDF document employs a common lure of 'free game hacks' to entice users. It contains a large number of external links, many of which point to pages offering 'robux hacks' or similar cheats, indicating a link farm or SEO manipulation tactic. The presence of a fake CAPTCHA prompt suggests an attempt to trick users into interacting with malicious content, likely leading to further downloads or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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.
  • 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 http://netcdn.co/app/431946152/free-roblox-no-human-verification-game-hack PDF link annotation
    • http://pustaka-smpn3tpi.com/repository/how-to-get-500-billion-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-a-free-golden-boombox-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-with-no-tests_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/cheat-engine-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-make-a-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/speed-hacks-on-fangs-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-creepy-elevator-hack-script_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-google-play-free-items_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/compte-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/wurst-download_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-speed-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-games-that-give-you-free-robux_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_off0000333a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x333A 22760 bytes
SHA-256: b3e1279e1ca69d0c483d13049837e536dd63f4edced83a6ca20d6e77154324ae
font_01_sfnt_off00006670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6670 19408 bytes
SHA-256: cf49539c92c55a56d67c5fa37264affb1bed84454119702c862deffd33894bcc

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