Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8372adfb8ff25bd…

MALICIOUS

PDF

32.3 KB Created: 2021-07-18 23:20:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bb7ce52b8c08e210b747afde0963275c SHA-1: 22fc40d96f2448be872313c4f51cb67c76b9065b SHA-256: e8372adfb8ff25bdab980001de685e9815dae4c5da9bc69f3b5043afdef97612
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 0.8871

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 http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-on-chromebook-game-hack PDF link annotation
    • http://artion.biz/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://artion.biz/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000294e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x294E 22800 bytes
SHA-256: 0709e4df4315923704ae7219ec97277767e5516533b420bd75e5fd1e6f5550fc
font_01_sfnt_off00005c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3D 18628 bytes
SHA-256: 3a4e3f8378819557dde5b27ff4793c702252829ac96e9550bc2b3bfa5905855e

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