Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17e18fea6a7fb84…

MALICIOUS

PDF

34.9 KB Created: 2021-06-26 05:09:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c295aa0a95c98bde877b358e6665043b SHA-1: a751a1bd34f496129467830d340275a1ad7779ce SHA-256: c17e18fea6a7fb849a979f7aefc9c880ce0a89c3bb5238bdb8a16313d7408278
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs, with a primary lure pointing to a site promising game hacks. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The document likely serves as a lure to download a second-stage payload.

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.co/app/431946152/roblox-stucid-fly-hack-game-hack PDF link annotation
    • https://esl.hess.com.tw/image/data/files/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/secret-skin-combination-get-free-robux_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/why-does-roblox-xbox-one-get-free-skins_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/descargar-roblox-hackeado-2021_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-support_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/pubg-uc-whatsapp-group-link_GM1330123889.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-minecraft-skin-maker_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_off00003201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3201 21792 bytes
SHA-256: 5aae4d0d742336a0aba345d4cd18906241bfc7dec7f06dff5a5c6d9a7867051d
font_01_sfnt_off000061da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DA 19540 bytes
SHA-256: 093224d6098528c305780d56fc0d29468344a5c44f8962b899a60c59443c8aa9

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