Malicious PDF — malware analysis report

Static analysis result for SHA-256 057cfe09648e3323…

MALICIOUS

PDF

45.8 KB Created: 2021-06-02 08:24:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 479792bcb3f47f3e4a391b99623fa576 SHA-1: 2c2c285205154812658ede69808f16ebb2c8eede SHA-256: 057cfe09648e33235cda23a7aed18f911a7a6b44e4933fe8676f95776a4be6f5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that point to websites offering game cheats and currency. The ML classifier strongly indicated maliciousness, and the presence of these links suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/431946152/hacker-ferdora-shirt-roblox-game-hack
    • https://www.elevage-chiot.fr/images/coin-master-free-spin-and-coin_GM406889139.pdf
    • https://www.elevage-chiot.fr/images/how-to-get-free-robux_GM431946152.pdf
    • https://www.elevage-chiot.fr/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • https://www.elevage-chiot.fr/images/hack-coin-master-android_GM406889139.pdf
    • https://www.elevage-chiot.fr/images/show-me-how-to-get-free-robux_GM431946152.pdf
    • https://www.elevage-chiot.fr/images/offers-for-robux_GM431946152.pdf
    • https://www.elevage-chiot.fr/images/latest-free-spin-coin-master-daily_GM406889139.pdf
    • https://www.elevage-chiot.fr/images/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdf
    • https://www.elevage-chiot.fr/images/how-to-get-free-robux-without-surveys_GM431946152.pdf
    • https://www.elevage-chiot.fr/images/coin-master-hack-mod-apk-2021-download_GM406889139.pdf
    • https://www.elevage-chiot.fr/images/coin-master-free-spins-link-today-new_GM406889139.pdf
    • https://www.elevage-chiot.fr/images/hack-coin-master-nyc_GM406889139.pdf
    • https://www.elevage-chiot.fr/images/coin-master-link-for-spins_GM406889139.pdf
    • https://www.elevage-chiot.fr/images/minecraft-windows-10-hacks_GM479516143.pdf
    • https://www.elevage-chiot.fr/images/coin-master-free-spins-coins_GM406889139.pdf
    • https://www.elevage-chiot.fr/images/coin-master-hack-tool-pc_GM406889139.pdf
    • https://www.elevage-chiot.fr/images/do-you-get-minecraft-windows-10-for-free_GM479516143.pdf
    • https://www.elevage-chiot.fr/images/coin-master-village-4_GM406889139.pdf
    • https://www.elevage-chiot.fr/images/free-spin-link-coin-master_GM406889139.pdf
    • https://www.elevage-chiot.fr/images/free-robux-com-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005335.bin
3901a94e15361461730a1a36197e3d99abd53755f7a960a6cabd40f732259bdf
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5335 25680 bytes
font_01_sfnt_off00008ed3.bin
a96b18c678e336a7af64cd66a3b2f8cc0247def1697ab13be4e8211e6156d4b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED3 18908 bytes