Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c13e08bc19a087…

MALICIOUS

PDF

32.3 KB Created: 2021-07-19 12:34:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 61af9fe60adade51a253a7226180a6c2 SHA-1: d56ca61251dc81a1a659d903ebb7a214a4ef3ae3 SHA-256: 89c13e08bc19a08759fa9a6a25dba8ae5928291725fc9ef4c392976c0300b2fb
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 0.9895

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/minecraft-free-download-iphone-game-hack PDF link annotation
    • https://ezgolfer.com.tw/image/data/files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-get-free-coins-on-coin-master_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_off00002b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B17 22040 bytes
SHA-256: d0a8ed8ccbd76a59060041540cafe5f9a81aa25d28fa8b1896c3e87118b95c91
font_01_sfnt_off00005b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B80 18632 bytes
SHA-256: 69c9e1d53de598faa7eba3c7e7e0e0cf5fcd320a3cd8fa35101ea10459ac0f9f

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