Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc5f508e82dbb90…

MALICIOUS

PDF

44.3 KB Created: 2021-06-11 08:38:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 64aebc6eb9a9feaaf7b8024661f5fdb6 SHA-1: 1afda204c893ff0116a8066e6d93e7234dfb751c SHA-256: ccc5f508e82dbb909f1f80efc99ec1e7ec73f87955d5fe9dbb267557a4af94d3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to attract traffic. The presence of a download button lure and a direct link to a suspicious URL further indicates a malicious intent to redirect users to potentially harmful content or downloads. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-trello-gold-roblox-game-hack
    • http://prazdnik-kzn.ru/images/how-to-download-minecraft-for-free_GM479516143.pdf
    • http://prazdnik-kzn.ru/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
    • http://prazdnik-kzn.ru/images/my-minecraft-account-was-hacked_GM479516143.pdf
    • http://prazdnik-kzn.ru/images/how-to-get-free-robux-no-scam_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/how-to-get-free-robux-hack_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/minecraft-hax-download-no-virus_GM479516143.pdf
    • http://prazdnik-kzn.ru/images/robux-hacks-2021_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/minecraft-net-free_GM479516143.pdf
    • http://prazdnik-kzn.ru/images/mcpe-master-coins-hack-download_GM406889139.pdf
    • http://prazdnik-kzn.ru/images/coin-master-hacks-for-free-spins_GM406889139.pdf
    • http://prazdnik-kzn.ru/images/minecraft-login-free_GM479516143.pdf
    • http://prazdnik-kzn.ru/images/free-games-coin-master_GM406889139.pdf
    • http://prazdnik-kzn.ru/images/free-spins-coin-master-legit_GM406889139.pdf
    • http://prazdnik-kzn.ru/images/everything-free-on-roblox_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/how-to-get-minecraft-for-free_GM479516143.pdf
    • http://prazdnik-kzn.ru/images/can-i-get-robux-for-free_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/free-robux-master_GM431946152.pdf
    • http://prazdnik-kzn.ru/images/coin-master-free-spin-app-iphone_GM406889139.pdf
    • http://prazdnik-kzn.ru/images/free-coin-master-hacks_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f55.bin
89bec2393be611d4745e1b3934daf8953095165ff719bced723b190f4683a0ee
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F55 26208 bytes
font_01_sfnt_off00008b01.bin
234330be0389e6fa6d06cf6555523c4ca52041f8503f1569e6aa66ed53b1f4bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B01 18124 bytes