Malicious PDF — malware analysis report

Static analysis result for SHA-256 3264cb8d0fbad0a7…

MALICIOUS

PDF

44.8 KB Created: 2021-05-14 20:51:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2b58338025c0c59ac167545af549e1e5 SHA-1: 9174df3aec9ea3e237aa6e35e19a3e5d70917465 SHA-256: 3264cb8d0fbad0a73cab885b336f8500cd6990aa313a1b98359d299a3ee241e0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a primary external URI, all pointing to websites offering free downloads related to popular games like Minecraft and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to drive traffic to potentially malicious download sites. While no scripts were explicitly extracted, the presence of embedded links and the ML classifier's high confidence score point towards a malicious intent to trick users into downloading unwanted or harmful software.

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/479516143/how-to-play-minecraft-for-free-game-hack PDF link annotation
    • http://goldwing-shop.ru/images/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://goldwing-shop.ru/images/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/rbx-sites_GM431946152.pdfIn PDF document text
    • http://goldwing-shop.ru/images/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://goldwing-shop.ru/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000497c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497C 25088 bytes
SHA-256: dc5ab042fd6db446e7e5034202bb7d9f946711cc06e6ea0be80d5d1d854b9cd8
font_01_sfnt_off0000827d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827D 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8D 18284 bytes
SHA-256: 30e565cae926cf2505d0f64cbbb860d09a66a84df24e80d913481d9233f56de2