Malicious PDF — malware analysis report

Static analysis result for SHA-256 b354142e8777b645…

MALICIOUS

PDF

39.3 KB Created: 2021-05-23 05:48:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e7cf47a3979891a259f2780d713bfd13 SHA-1: 68ea31eb89b1043a1c0bab02fadc10e10e93a80d SHA-256: b354142e8777b645253be3b838563b0d8c129f068ebf1a79d136907b449fabe6
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 0.8060

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/robux-gift-card-free-game-hack PDF link annotation
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-pics_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://wolfzscriptsIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31C2 25520 bytes
SHA-256: d5ddcb4da86b818f5619a4f4b755caa995b86a659fba943f439cfa7fd149e851
font_01_sfnt_off00006cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF1 2924 bytes
SHA-256: 1c100e7b436bda6e47dff3d00ef4fea7b86fa0482f8838165ad6e809b2142279
font_02_sfnt_off000076f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F0 18640 bytes
SHA-256: dc19c2dc7c571358abc7904f3409549de68542ff7a2dde77b507fd070c6276df

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