Malicious PDF — malware analysis report

Static analysis result for SHA-256 94249d7abf35a69a…

MALICIOUS

PDF

35.4 KB Created: 2021-07-29 15:00:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5a364a71d17650830d651e730f3be4c9 SHA-1: 0833fee8573a4e4b6336aff918bdfda935d07d69 SHA-256: 94249d7abf35a69a9589789f4326374b32fc82a466320c350d3f78900cdb2cff
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 0.9962

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/431946152/free-robux-games-that-actually-work-game-hack PDF link annotation
    • https://www.tiancom.com.tw/upload/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00002ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF8 23304 bytes
SHA-256: 2a91b259f1209de75b584a8dba7b6079eed509f7c8cd235a10ed93ade41e03db
font_01_sfnt_off000064aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AA 19580 bytes
SHA-256: 2407dda2f08d0eacd7cdcbe2256f20ae0f2146034d67ebe9bb497e3e64a40e8a

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