Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b8e411eae10bded…

MALICIOUS

PDF

41.1 KB Created: 2021-04-28 07:57:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c7feceb44edf18186f680276b254e145 SHA-1: c556cb35a5f0555cfefd92d0bdf88c4214242ff1 SHA-256: 6b8e411eae10bded9cad6f8fe19285d9a194137aaca71cbb719692f287986606
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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 https://netcdn.xyz/app/431946152/roblox-cheat-unknwocnehats-game-hack PDF link annotation
    • https://bioscience.kyst.com.tw/image/data/files/hacks-para-infinity-anime-roblox.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/unlimited-robux-hack-free.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/all-roblox-hacking.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/como-tener-mas-seguidores-en-roblox-sin-hacks.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/comment-hacker-robux-sur-telephone.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-robux-march-2021.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-free-clothes-on-roblox-ipad.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-free-robux-easy-no-survey.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/rbx-roblox-free.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/omega-hack-roblox.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 2

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_off0000408a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x408A 27072 bytes
SHA-256: 2c7ce22b71268d013a84922cac50f3cf595da80640268741f6641da15af70b9f
font_01_sfnt_off00007d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D24 18804 bytes
SHA-256: aee25829991f5fcb3e255046611ac5407f336452c7068e0a31620e582cdbcd62

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