Malicious PDF — malware analysis report

Static analysis result for SHA-256 90681f71f52a180e…

MALICIOUS

PDF

37.5 KB Created: 2021-05-23 12:05:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e6881f9b4cddc21f6fa1bca493b808ec SHA-1: b9f1c2a897aad1128513ab3c4d27399ea907ce83 SHA-256: 90681f71f52a180e1844fc8cff5bd0433c3d3186f014df4ea334cd6a3cd98d05
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/479516143/minecraft-bedrock-edition-download-pc-free-game-hack PDF link annotation
    • http://www.danzamaniapergine.it/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/free-spins-coin-master-2021_GM406889139.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_off0000348f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x348F 26108 bytes
SHA-256: 215f9945aa9b0e1306b664ab9a90e4b7a2de5d2a3df5ccbdc6937799426071b8
font_01_sfnt_off00007007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7007 18828 bytes
SHA-256: 57b97413d46eb8dd02e8163e11e04ebb18f1b46f22b88b993c8d7eb158a8ca98

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