Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe61a79d2f70f239…

MALICIOUS

PDF

43.1 KB Created: 2021-05-21 15:15:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3acd41bb5157c3f5e2e3c007df36d104 SHA-1: 118382288998bbee7e3d0d0bf218d79104db91aa SHA-256: fe61a79d2f70f23908108c6fbeac65b605425747a9323372bf6333d041e68b65
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 0.7947

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/835599320/free-tiktok-likes-no-human-verification-or-downloading-apps-game-hack PDF link annotation
    • http://innovativefs.co.uk/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003794.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3794 23664 bytes
SHA-256: 67e924407af70fecd1e26eae3c40d67fa9431445913d04c15d86664e68f3dbc2
font_01_sfnt_off00006d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6C 3372 bytes
SHA-256: dfbbf67cbc7ecc66ac4d03805ccfff7e5c1407898ea3c5e2b9241b85217ff1cd
font_02_sfnt_off000078ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78EE 3120 bytes
SHA-256: 49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca
font_03_sfnt_off00008402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8402 19260 bytes
SHA-256: 26817b4cedfa85687dbcd5cd5fe0b6768af480ef1d18351329c732120202e544

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