Malicious PDF — malware analysis report

Static analysis result for SHA-256 8640278b9eef8636…

MALICIOUS

PDF

45.2 KB Created: 2021-05-19 14:38:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 067eac050abf6c96f152613368df7f69 SHA-1: 73e85b912256b712fcb6c57b4f295e6b1fe9d43f SHA-256: 8640278b9eef86364b7cb34dee70f52e37cc8c4eda66c7d69fefacb5b73b3282
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting it is designed to redirect users to malicious websites. The document body and extracted URLs indicate a lure related to game hacks and cheats, specifically for 'Coin Master'. The presence of a PDF_SEO_LINK_FARM heuristic firing and a high ML score further support the malicious classification. No scripts were extracted, but the overall structure points to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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-online-generator-game-hack
    • http://italymania.ru/images/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdf
    • http://italymania.ru/images/was-minecraft-ever-free_GM479516143.pdf
    • http://italymania.ru/images/coin-master-free-spin-link-today-50_GM406889139.pdf
    • http://italymania.ru/images/coin-master-game-free-spin-download_GM406889139.pdf
    • http://italymania.ru/images/hacks-for-coin-master_GM406889139.pdf
    • http://italymania.ru/images/what-is-coin-master-app_GM406889139.pdf
    • http://italymania.ru/images/free-spins-on-coin-master-without-human-verification_GM406889139.pdf
    • http://italymania.ru/images/rape-simulator_GM431946152.pdf
    • http://italymania.ru/images/how-can-you-get-free-robux_GM431946152.pdf
    • http://italymania.ru/images/coin-master-free-coins-and-spins-today_GM406889139.pdf
    • http://italymania.ru/images/master-coin-free-spin-daily_GM406889139.pdf
    • http://italymania.ru/images/static-moonactive-net-free-spins-coin-master_GM406889139.pdf
    • http://italymania.ru/images/coin-master-2021-free-spins-link-today_GM406889139.pdf
    • http://italymania.ru/images/free-robux-for-kids_GM431946152.pdf
    • http://italymania.ru/images/coin-master-free-spins-cheat_GM406889139.pdf
    • http://italymania.ru/images/hacked-roblox-accounts-list_GM431946152.pdf
    • http://italymania.ru/images/get-me-free-robux_GM431946152.pdf
    • http://italymania.ru/images/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://italymania.ru/images/free-minecraft-hosting-24-7_GM479516143.pdf
    • http://italymania.ru/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a81.bin
25ff1c22def2cc54411ab4b7af980eaa46a16b507438a104be2ed1fe44bb002e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A81 25564 bytes
font_01_sfnt_off00008492.bin
34e186eaedd0abe30d9918006f165105e5268ee5cd317aca3337fe6c60666134
pdf-font-stream PDF embedded font (sfnt) at offset 0x8492 3204 bytes
font_02_sfnt_off00008f95.bin
f10d9d7ac26b37aa9393865027a0ede53c5b0e24a5f9161d6938870a0e29fed8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F95 17788 bytes