Malicious PDF — malware analysis report

Static analysis result for SHA-256 735467942a9cca23…

MALICIOUS

PDF

44.6 KB Created: 2021-05-11 18:12:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3d3aa577806824f2a9a384390a369abc SHA-1: 6c93e5bdec7694735354b492bf90bbcddc8baed0 SHA-256: 735467942a9cca234523fd6b3baca7cd3dc48f9497472b3a457402a6aa9fafbf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF files related to game hacks and free currency. The ML classifier strongly indicated maliciousness, and the presence of a "download button" heuristic suggests a lure for users to click these links. The primary attack pattern involves directing users to download further content, likely malicious payloads, under the guise of cheats or hacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/2021-coin-master-hack-game-hack
    • https://ethraa.ae/userfiles/files/coin-master-daily-free-spin-and-coin-link_GM406889139.pdf
    • https://ethraa.ae/userfiles/files/earn-free-robux-today_GM431946152.pdf
    • https://ethraa.ae/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • https://ethraa.ae/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • https://ethraa.ae/userfiles/files/hack-minecraft_GM479516143.pdf
    • https://ethraa.ae/userfiles/files/coin-master-free-coins_GM406889139.pdf
    • https://ethraa.ae/userfiles/files/free-spins-coin-master-links_GM406889139.pdf
    • https://ethraa.ae/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdf
    • https://ethraa.ae/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • https://ethraa.ae/userfiles/files/coin-master-hack-apk-april-12-2021_GM406889139.pdf
    • https://ethraa.ae/userfiles/files/free-spin-in-coin-master_GM406889139.pdf
    • https://ethraa.ae/userfiles/files/free-coin-master-spins-blog_GM406889139.pdf
    • https://ethraa.ae/userfiles/files/coin-master-hack-apk-35-33_GM406889139.pdf
    • https://ethraa.ae/userfiles/files/coin-master-free-cards_GM406889139.pdf
    • https://ethraa.ae/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdf
    • https://ethraa.ae/userfiles/files/coin-master-free-spin-links-december-30-2021_GM406889139.pdf
    • https://ethraa.ae/userfiles/files/free-spins-generated-from-coin-master_GM406889139.pdf
    • https://ethraa.ae/userfiles/files/best-free-minecraft-texture-packs_GM479516143.pdf
    • https://ethraa.ae/userfiles/files/mc-hacks_GM479516143.pdf
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049fe.bin
7a4141148c31edd2e1d7a793f9f64f846dfa5cd670400ffe206c19bdb59ba139
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FE 30012 bytes
font_01_sfnt_off00008c67.bin
920b3105a00d2e81b44cb3def78d47879883f677e8f7cd602ed441085c36723f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C67 18116 bytes