Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3d0fee732c3afd…

MALICIOUS

PDF

39.4 KB Created: 2021-05-20 22:36:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 66034f075e62b760ca3419093c583518 SHA-1: 6b7090e0843abedc2c7c3965696fd0e14b88d107 SHA-256: 8f3d0fee732c3afd2849460dec8581d770a3cb77e3c34dbaec136137880a7153
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 0.8060

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/free-back-accessories-roblox-game-hack PDF link annotation
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003244.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3244 25620 bytes
SHA-256: 33dd295ba48ced5954180e693fd74f40d576131aafd86b68eb0253bae53eb5d9
font_01_sfnt_off00006e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2C 2852 bytes
SHA-256: e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
font_02_sfnt_off000077ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77EE 18468 bytes
SHA-256: ed1381c69922638ba3deea165f9c97413a9991048cfb55badf94070f5a9fa8be

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