Malicious PDF — malware analysis report

Static analysis result for SHA-256 91e3259051d8f329…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 13:22:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 50290ed47db09a8c3a4a753f848fa9f8 SHA-1: 6a9670780cd8038a8b4c82c936787c8fab1608a3 SHA-256: 91e3259051d8f329423eabca9d0acc4ddc89e58ff1bb7be111a1f964fd30d88b
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.tw/app/431946152/roblox-free-clothes-hack-game-hack PDF link annotation
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-get-free-robux-no-hack-no-inspect_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/robux-hack-2p_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/cheat-engine-roblox-not-patched_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/assassin-2-hack-roblox_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/robuxian-hack-roblox-animations_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/tiktok-free-gallery_GM835599320.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-get-free-shirts-roblox-2021_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/wall-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-minecraft-premium-account_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_off00002e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9D 22464 bytes
SHA-256: a99b12272e78d2d5a3b0381bcf1efbda206e2c13b2d2bc5c6eef77ce74eba215
font_01_sfnt_off000060f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F6 19088 bytes
SHA-256: 5ee29a81f5e6d86a84ce6a263a5f791f90c1f4b14f55e40609aef6b4e9ea1c16

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