Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe6ea4b209402cd…

MALICIOUS

PDF

43.9 KB Created: 2021-06-09 15:30:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0c1982f6b7f86e454d9c5aaadbe242a6 SHA-1: ff8929534a538f29e203d6d33e8f2291df598913 SHA-256: 7fe6ea4b209402cd7603d909cfacb0b128fa7cdee82a5395b662cd9940ee5cc2
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier and exhibits characteristics of a fake CAPTCHA lure. It contains a mass of external links, including one pointing to a URL that appears to be a download page for game hacks. The presence of numerous PDF links suggests an attempt to create a link farm, potentially for SEO manipulation or to host further malicious content. The document's primary goal seems to be tricking users into clicking these links, likely leading to the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/tuto-hacker-sur-prison-life-roblox-game-hack
    • http://internetdeputy.com/images/i-cant-get-free-spins-coin-master_GM406889139.pdf
    • http://internetdeputy.com/images/who-to-get-free-robux_GM431946152.pdf
    • http://internetdeputy.com/images/online-coin-master-hack-here_GM406889139.pdf
    • http://internetdeputy.com/images/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • http://internetdeputy.com/images/minecraft-bedrock-download-pc-free_GM479516143.pdf
    • http://internetdeputy.com/images/daily-spin-and-coin_GM406889139.pdf
    • http://internetdeputy.com/images/how-to-use-hacks-in-roblox-prison-life_GM431946152.pdf
    • http://internetdeputy.com/images/free-games-like-roblox_GM431946152.pdf
    • http://internetdeputy.com/images/how-to-get-unlimited-robux-2021_GM431946152.pdf
    • http://internetdeputy.com/images/free-robux-no-verify-2021_GM431946152.pdf
    • http://internetdeputy.com/images/hack-de-roblox-traspasar-paredes_GM431946152.pdf
    • http://internetdeputy.com/images/free-robux-rbxrewards_GM431946152.pdf
    • http://internetdeputy.com/images/pubg-uc-iraq_GM1330123889.pdf
    • http://internetdeputy.com/images/roblox-promo-codes-2021-robux_GM431946152.pdf
    • http://internetdeputy.com/images/roblox-jailbreak-hack-download_GM431946152.pdf
    • http://internetdeputy.com/images/free-spins-coin-master-app_GM406889139.pdf
    • http://internetdeputy.com/images/como-hackear-coin-master-2021_GM406889139.pdf
    • http://internetdeputy.com/images/coin-master-free-gold-cards-link_GM406889139.pdf
    • http://internetdeputy.com/images/free-roblox-shirt-templates-2021-christmas_GM431946152.pdf
    • http://internetdeputy.com/images/pokemon-go-free-download-latest-version_GM1094591345.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005053.bin
6fe93b94859cd78465fa91aedc817d00ccd527e84753c401da39b5e780edcb55
pdf-font-stream PDF embedded font (sfnt) at offset 0x5053 24920 bytes
font_01_sfnt_off000087c0.bin
860d5e50b07e47f192fa226b676c68a7f2b5e91f0b4568d2a3cf20d33456c714
pdf-font-stream PDF embedded font (sfnt) at offset 0x87C0 18700 bytes