Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e86aeaf4eb8b989…

MALICIOUS

PDF

36.2 KB Created: 2021-07-05 01:35:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cbbc803a5470949c53d3bb0811bb458e SHA-1: 2bb004d7e96758d0034de236cd41e05e858d425a SHA-256: 4e86aeaf4eb8b989d3909c0d07043c50fac784f916d9f63704bd37d8503f17a0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free in-game currency, directing users to a suspicious URL. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs further supports a phishing or scam attempt. No scripts were extracted from this sample, but the overall pattern suggests a social engineering attack to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/how-do-you-get-free-pet-food-in-coin-master-game-hack PDF link annotation
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/azure-download-roblox-hack_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/free-card-codes-robux_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/cheats-de-ben-10-universal-showdown-roblox_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/free-roblox-items-pastebin_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/free-download-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/free-roblox-accounts-with-robux-and-obc-2021_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/hack-para-tener-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-someone-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/free-roblox-cards-2021_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-win-10-free_GM479516143.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
font_00_sfnt_off00003562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3562 22948 bytes
SHA-256: 97f758982f5bb44c663767ed4ca27ca35a2249c35c512594fc31af9e78138d8e
font_01_sfnt_off000068d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D9 18960 bytes
SHA-256: 9e03b029e376b531d63ae140c0287df0ed08580784c9ca8a104e51c253472481

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