Malicious PDF — malware analysis report

Static analysis result for SHA-256 8679d6b346d196ee…

MALICIOUS

PDF

44.6 KB Created: 2021-05-17 15:08:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dbe21ad0f02c71970655d19a4155d52f SHA-1: d388a1f8967a0911fa4d8415b06c91f68ec36d24 SHA-256: 8679d6b346d196eea98afa0bf6046709bf8d58cc6976b2250a576d63ef39a01d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized to appear as legitimate game-related downloads. The primary URL, 'https://netcdn.xyz/app/406889139/coin-master-hack-2021-apk-download-game-hack', suggests a lure for a game hack. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though partially corrupted, contains references to game hacks and download links, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/coin-master-hack-2021-apk-download-game-hack
    • https://lesegais.ru/images/coin-master-game-hack_GM406889139.pdf
    • https://lesegais.ru/images/minecraft-free-download-windows-10_GM479516143.pdf
    • https://lesegais.ru/images/real-coin-master-free-spins_GM406889139.pdf
    • https://lesegais.ru/images/free-robux-with-no-verification_GM431946152.pdf
    • https://lesegais.ru/images/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdf
    • https://lesegais.ru/images/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • https://lesegais.ru/images/free-robux-cards_GM431946152.pdf
    • https://lesegais.ru/images/114-4-hacks_GM479516143.pdf
    • https://lesegais.ru/images/free-spin-link-coin-master-today_GM406889139.pdf
    • https://lesegais.ru/images/martian-lettuce-coin-master-free_GM406889139.pdf
    • https://lesegais.ru/images/coin-master-hacks-no-downloading_GM406889139.pdf
    • https://lesegais.ru/images/how-can-you-get-free-spins-on-coin-master_GM406889139.pdf
    • https://lesegais.ru/images/earn-free-robux-for-roblox_GM431946152.pdf
    • https://lesegais.ru/images/free-robux-generator-2021_GM431946152.pdf
    • https://lesegais.ru/images/coin-master-free-spins-link-today-hack_GM406889139.pdf
    • https://lesegais.ru/images/roblox-free-robux-com_GM431946152.pdf
    • https://lesegais.ru/images/free-coin-spin-daily-link-coin-master_GM406889139.pdf
    • https://lesegais.ru/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • https://lesegais.ru/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • https://lesegais.ru/images/how-to-get-free-robux-website_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004873.bin
b84dd20ddfebdf818895f708a33b6f04737c918a9264adf82a6eb2a6c49e6a01
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4873 24560 bytes
font_01_sfnt_off00007feb.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEB 2840 bytes
font_02_sfnt_off0000899c.bin
d7d40464d831938cfa9caec420339d0a09463e275fb7b32e55518fa26c88094b
pdf-font-stream PDF embedded font (sfnt) at offset 0x899C 18876 bytes