Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79892dbe016035f…

MALICIOUS

PDF

46.9 KB Created: 2021-05-14 03:42:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 62c189d7c314b984b23eac5966b14c59 SHA-1: 1201cb45d92fca3ab7d7747cf4be24348c2360f3 SHA-256: e79892dbe016035f9001d2ff177b31e568bfb2f9249442046e11a9ce3a6f0c59
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 0.8948

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/406889139/daily-coin-master-free-spin-link-game-hack PDF link annotation
    • http://cornerwebstudio.com/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/robux-website_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/robux-game_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-minecraft-printables_GM479516143.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_003_off00004673.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4673 24848 bytes
SHA-256: e5d103af94df187109464c9207844d4d8bcbfd2485049e437805d9506159269e
font_01_sfnt_off00007ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF3 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off0000947e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x947E 18476 bytes
SHA-256: 0e8ff706f766ebeac8fd51df3b46864e48e50accc558ba14dc70aa8347bf43ac

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