Malicious PDF — malware analysis report

Static analysis result for SHA-256 4466446bd4e66682…

MALICIOUS

PDF

42.7 KB Created: 2021-05-14 15:45:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b7f7fc01e6da1d926f63e8fcd49f8501 SHA-1: a7f0b3f11bcd4659305b202021f50438e83d828d SHA-256: 4466446bd4e666827cbf947b909eecb76945f10805a85bdade69608ff7998b93
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are SEO-optimized and point to sites offering game-related cheats and hosting. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious workflow designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-modded-minecraft-server-hosting-game-hack
    • http://ag-metal.fr/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://ag-metal.fr/images/robux-website_GM431946152.pdf
    • http://ag-metal.fr/images/free-promo-codes-for-coin-master_GM406889139.pdf
    • http://ag-metal.fr/images/rewardex-robux_GM431946152.pdf
    • http://ag-metal.fr/images/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://ag-metal.fr/images/free-ways-to-get-robux_GM431946152.pdf
    • http://ag-metal.fr/images/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://ag-metal.fr/images/coinmaster-free-spins-link_GM406889139.pdf
    • http://ag-metal.fr/images/http-bit-ly-coin-master-hack_GM406889139.pdf
    • http://ag-metal.fr/images/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • http://ag-metal.fr/images/free-online-spins-coin-master_GM406889139.pdf
    • http://ag-metal.fr/images/my-roblox-account-was-hacked_GM431946152.pdf
    • http://ag-metal.fr/images/roblox-top_GM431946152.pdf
    • http://ag-metal.fr/images/earn-free-robux-on-roblox_GM431946152.pdf
    • http://ag-metal.fr/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdf
    • http://ag-metal.fr/images/free-minecraft-capes_GM479516143.pdf
    • http://ag-metal.fr/images/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdf
    • http://ag-metal.fr/images/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdf
    • http://ag-metal.fr/images/how-to-get-free-stuff-on-roblox_GM431946152.pdf
    • http://ag-metal.fr/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cb5.bin
fe5cce1052edd6572dbcff154e47980932efb85f81284e1fff7e97dfe5e366ee
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB5 24492 bytes
font_01_sfnt_off000084b6.bin
4ae19380f71872a59bca81a6826a2f1ac99dae3e110f9987d961b4518a9677d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x84B6 18284 bytes