Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d86dff08f20501d…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 02:56:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c38649cd7352a3876529ee6c305aafa1 SHA-1: d61a5bc5b3c975912e6c73e409827d78d53b9fcd SHA-256: 8d86dff08f20501d044ac3df423dd68ce7f4413ab35d480a3b1f024dcd10d43a
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 0.9980

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/cheat-codes-for-roblox-assassin-game-hack PDF link annotation
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-robux-generator-no-offers_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/what-roblox-game-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-spin_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-hack-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/hacking-roblox-peps_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-tiktok-followers-quick-and-easy_GM835599320.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/pokemon-go-free-raid-pass_GM1094591345.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-robux-without-verification_GM431946152.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_off00002f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F08 22888 bytes
SHA-256: c1674fef7467901af4d7b9afa225d71996f10c5189678a7cb0355d22e15ddb08
font_01_sfnt_off0000629a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629A 19216 bytes
SHA-256: e4e4078a1df03a3272e05a571392261cced3194b0b73cab2c5ce9ffbc2f39c58

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