Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc78f4b4ce7bd00…

MALICIOUS

PDF

37.3 KB Created: 2021-05-20 13:31:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3aa9cdcfaef0a1c4f95bb55d938cffcc SHA-1: 98aa681f11b5f63cc43b636a835f83110babe64b SHA-256: ebc78f4b4ce7bd00369b870c2158754db0f4380e55de04bc4f851e39dd303d72
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 0.9447

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/roblox-hack-tool-game-hack PDF link annotation
    • https://www.san-ben.com.tw/upload/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/free-online-games-like-minecraft_GM479516143.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
stream_002_off00003455.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3455 26164 bytes
SHA-256: e739c440f606a982a168326016998eb1930cfccc683d0add08f70dba5dfb61ae
font_01_sfnt_off000070d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D7 18184 bytes
SHA-256: 31a2c7908075477008558d8ad35fc874cd0c1469ac409190117581929eec3da7

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