Malicious PDF — malware analysis report

Static analysis result for SHA-256 be31d1b961b3593b…

MALICIOUS

PDF

44.1 KB Created: 2021-04-23 17:15:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 314f297dbaee283f9f520d2ea7f89cf7 SHA-1: f9ed5e8599c595ac82a0e9a59fbca113d61e403d SHA-256: be31d1b961b3593b7326e4e10e087323636474ee29d32fd8fa33e73c44e62c69
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 0.9868

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://netsecure.top/app/431946152/20-robux-free-game-hack PDF link annotation
    • https://sparkthis.org/ckfinder/userfiles/files/roblox-free-iland-royal.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/cheat-avatar-roblox.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/games-cheat-engine-works-roblox.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/hack-roblox-one-punch-man.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/how-to-roblox-speed-hack.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/hacker-shirt-for-free-roblox.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/best-free-gun-models-for-roblox.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/best-roblox-hacks-2021.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/100-free-robux-hack.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/all-free-in-catalog-roblox.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000428a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x428A 26900 bytes
SHA-256: 4ec0aa81454995f5de2740267d258b04897cf0b09c84371b5aac9ef9dfe6751e
font_01_sfnt_off00007f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F17 3312 bytes
SHA-256: 40bd8eebcb3a0d68a8646f1930e84f30a44bfa48525263c6c528f0bc1e9c1677
font_02_sfnt_off00008a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A67 18308 bytes
SHA-256: 3380a891510dd40622115de6e4adddff84952dc3ba192c8d8f96b1b8d1080ff8

Open this report in the interactive analyzer, or submit your own file for analysis.