Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc9b30e6fa13a91…

MALICIOUS

PDF

48.7 KB Created: 2021-06-11 02:19:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 665af43b989b4fb35c3edefbd5dac9ef SHA-1: aae2ba2f4fd6ef77a921a52fae58a1afb98a9a10 SHA-256: 5fc9b30e6fa13a9136933be8ffd7062f46b09bcf2aff081cedccdaefaa451b35
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are structured as a link farm pointing to other PDF files. The primary URL and several others suggest a lure for game hacks and cheats, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/hack-sharkbite-roblox-game-hack
    • http://www.eaapiaria.es/images/coin-master-free-link-spin_GM406889139.pdf
    • http://www.eaapiaria.es/images/how-to-get-minecraft-java-free_GM479516143.pdf
    • http://www.eaapiaria.es/images/roblox-speed-hack_GM431946152.pdf
    • http://www.eaapiaria.es/images/coin-master-heaven-free-spins-link_GM406889139.pdf
    • http://www.eaapiaria.es/images/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://www.eaapiaria.es/images/coin-master-hacks-no-downloading_GM406889139.pdf
    • http://www.eaapiaria.es/images/free-robux-gamecard_GM431946152.pdf
    • http://www.eaapiaria.es/images/coin-master-daily-free-spins_GM406889139.pdf
    • http://www.eaapiaria.es/images/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://www.eaapiaria.es/images/how-to-hack-in-a-roblox-account_GM431946152.pdf
    • http://www.eaapiaria.es/images/jojo-characters-on-roblox-free_GM431946152.pdf
    • http://www.eaapiaria.es/images/roblox-hack-robux-2021-android_GM431946152.pdf
    • http://www.eaapiaria.es/images/how-to-get-free-shields-on-coin-master_GM406889139.pdf
    • http://www.eaapiaria.es/images/earn-free-robux-for-roblox_GM431946152.pdf
    • http://www.eaapiaria.es/images/minecraft-games-to-play-for-free_GM479516143.pdf
    • http://www.eaapiaria.es/images/roblox-booga-booga-cheat-engine-codes_GM431946152.pdf
    • http://www.eaapiaria.es/images/roblox-gift-card-free-codes_GM431946152.pdf
    • http://www.eaapiaria.es/images/free-spins-october-28-2021-coin-master_GM406889139.pdf
    • http://www.eaapiaria.es/images/coin-master-free-spins-app_GM406889139.pdf
    • http://www.eaapiaria.es/images/how-to-get-free-robux-codes-2021_GM431946152.pdf
    • https://discord
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005166.bin
3b6d2077a652735060ca05ef81881d2fc334d613eedba92895a19d8c63b3e124
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5166 27524 bytes
font_01_sfnt_off000090f8.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x90F8 2832 bytes
font_02_sfnt_off00009aa9.bin
35b3d5ea2cfcbab7b25170691f0f8ecf1079547fa079267eac16e71335e5307a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA9 18572 bytes