Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4f736fc040881c…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 22:01:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ce8d604912af72040df81eadea1e2df5 SHA-1: 4d63b648905cb86fa97235f2eefad300293f35a6 SHA-256: ce4f736fc040881cb6813d7bdadbf54e4561011160e99ddd00c20920268efb9f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9865

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.online/app/406889139/get-coin-master-spins-free-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pubg-uc-980_GM1330123889.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_004_off00005194.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5194 24932 bytes
SHA-256: 5fe131e0b5b471dd9ca7dbd071095bd18aa341ef2a10edf432016a1ce32a9839
font_01_sfnt_off000088cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88CD 17884 bytes
SHA-256: 876927319d3d02f2246654e6bcbdf62d71497dcf4510b2be4e7f27a5ee8d82be

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