Malicious PDF — malware analysis report

Static analysis result for SHA-256 02368e5d603effbd…

MALICIOUS

PDF

43.6 KB Created: 2021-05-13 11:46:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bf15887a3fdcbe3f999b64e746775ee7 SHA-1: ec61ebc0fe6d6cac795366953282e6968efcca71 SHA-256: 02368e5d603effbdd1953b0cb9d3221d1960c17c16b9928b500b9409439de4aa
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files hosted on the same domain, suggesting a link farm designed to attract users searching for game hacks. The presence of a 'download button' heuristic further supports the lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and extensive link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-spin-hack-no-human-verification-game-hack
    • https://jp.esuhai.com/upload/files/coin-master-hack-2021-without-verification_GM406889139.pdf
    • https://jp.esuhai.com/upload/files/coin-master-hack-app-android-download_GM406889139.pdf
    • https://jp.esuhai.com/upload/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdf
    • https://jp.esuhai.com/upload/files/blogspot-coin-master-free-spins_GM406889139.pdf
    • https://jp.esuhai.com/upload/files/flip-master-coins-hack_GM406889139.pdf
    • https://jp.esuhai.com/upload/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • https://jp.esuhai.com/upload/files/coin-master-hack-apk-with-fb-login_GM406889139.pdf
    • https://jp.esuhai.com/upload/files/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdf
    • https://jp.esuhai.com/upload/files/minecraft-mojang-free_GM479516143.pdf
    • https://jp.esuhai.com/upload/files/roblox-hack-me-robux_GM431946152.pdf
    • https://jp.esuhai.com/upload/files/coin-master-hacks-iphone_GM406889139.pdf
    • https://jp.esuhai.com/upload/files/free-coins-coin-master-blog_GM406889139.pdf
    • https://jp.esuhai.com/upload/files/roblox-hacked-accounts-list_GM431946152.pdf
    • https://jp.esuhai.com/upload/files/free-robux-just-enter-username-and-password_GM431946152.pdf
    • https://jp.esuhai.com/upload/files/fan-page-coin-master_GM406889139.pdf
    • https://jp.esuhai.com/upload/files/how-to-get-800-robux-for-free_GM431946152.pdf
    • https://jp.esuhai.com/upload/files/how-to-get-free-robux-no-scam_GM431946152.pdf
    • https://jp.esuhai.com/upload/files/coin-master-free-2021-spin-link-today_GM406889139.pdf
    • https://jp.esuhai.com/upload/files/coin-master-hack-ios-2021_GM406889139.pdf
    • https://jp.esuhai.com/upload/files/websites-that-give-you-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b5f.bin
865daed4ff3a6cb67c3ba38e4e3fe72d96df22ac4f511df0a8752543370cc2f7
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5F 28760 bytes
font_01_sfnt_off000087cc.bin
feaa68982acd17c800efc0836f6c7a3b9c97a222263dc84119fc0f3c695ff622
pdf-font-stream PDF embedded font (sfnt) at offset 0x87CC 18428 bytes