Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f036b70ae82a25…

MALICIOUS

PDF

37.5 KB Created: 2021-05-23 20:06:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1697183d2432c0ff56b2622e60ef8745 SHA-1: c0dc8b55cb2a15ea5131cf555cad8b649cbb17d5 SHA-256: c1f036b70ae82a25615878f131fb9f6baecd7d7959cba9db8ebdbdb629f920bd
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/free-minecraft-premium-account-game-hack PDF link annotation
    • https://dripalia.com/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://dripalia.com/images/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://dripalia.com/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://dripalia.com/images/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://dripalia.com/images/moonactive-coin-master-free-spins-link_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_off0000337a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x337A 28428 bytes
SHA-256: d37c728056c8cff3cea1e9499537c38dcc6780330351a94e9a66387814fd7d9b
font_01_sfnt_off0000717f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x717F 18264 bytes
SHA-256: d2b91c2a6de84c5c57e6f7a8c0463896f89b33dea675ffd93dbde2c8d35c79e1

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