Malicious PDF — malware analysis report

Static analysis result for SHA-256 655b8c4c5d129994…

MALICIOUS

PDF

36.8 KB Created: 2021-05-22 01:44:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2f0769e9bdb155ad18d4c0c0a249efce SHA-1: abbfa0a8b81191c4aa0a2cf38d5a30b6ea6f4fed SHA-256: 655b8c4c5d129994a923aa44a64bd89d3fde0c7bff50d2bab313103d093e8d74
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/how-to-hack-peoples-roblox-accounts-game-hack PDF link annotation
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/pubg-uc-18_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F7 25700 bytes
SHA-256: 9bcd5f2318ac8e24027e4070788b3e1ba7f7d0965fab428c13d12a249ba420ce
font_01_sfnt_off00006ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA0 18920 bytes
SHA-256: cd7407ef9aef6c4c50b1fdf01e763fd2e22944ade267215dee183f168e7b87f5

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