Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bbd8df41b3b5e5…

MALICIOUS

PDF

32.5 KB Created: 2021-07-20 03:40:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5b24b733c5971eecfb49ccb5fc8afbe1 SHA-1: 08704bd104881c870682e06b621f44e37ddfd374 SHA-256: f6bbd8df41b3b5e586503edde86652aaa742e189b7bf696913c58fec52f939c6
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that lure the user to click on a URL promising free Robux for the game Roblox. The primary link, http://netcdn.tw/app/431946152/roblox36.com-free-robux-game-hack, is flagged as a malicious redirector. The document body also contains a call to action to 'CLICK HERE TO ACCESS ROBUX GENERATOR', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox36.com-free-robux-game-hack In PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-tiktok-like_GM835599320.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/tiktok-views-free_GM835599320.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-fan-page-free-spins_GM406889139.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_off000028e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28E7 22460 bytes
SHA-256: 8aa5a0dcc3739fdf32b1847dc6453f80ad97472b6b299829bdbdfd26768ca3fa
font_01_sfnt_off00005b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2D 18940 bytes
SHA-256: f32316c3924b123291bec9797e338b19bc01463e7838b8a228eaa1e4eeb0d8f0

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