Malicious PDF — malware analysis report

Static analysis result for SHA-256 47fdb1985b40d706…

MALICIOUS

PDF

46.1 KB Created: 2021-06-09 13:27:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fb970034b5dbad7d0989751a710345db SHA-1: 02d3d07344add6aedd56d2d47f2e6695d7544519 SHA-256: 47fdb1985b40d706d75cfa2d1fa9a9b219b86f5defe2135a9242b3c900a8ec22
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are SEO-optimized and point to websites offering game hacks and free virtual currency. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a link farm indicates a likely attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a lure for phishing or malware distribution.

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.tw/app/431946152/free-robux-accounts-2021-game-hack
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/roblox-star-wars-first-order-cheat-engine_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/how-to-make-dance-party-hack-roblox_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/como-hackear-roblox-2021-en-android_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/tiktok-followers-for-free_GM835599320.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/este-hack-de-robux-funciona-2021_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/free-robux-link-inspect_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/roblox-afk-saber-simulator-hack_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/roblox-promo-codes-free-robux_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/how-you-get-free-robux_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/roblox-hack-account-bugmenot-wiki_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/how-do-you-get-a-lot-of-robux-for-free_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/gun-hacks-for-roblox-2021_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/free-shoulder-pets-in-roblox_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/roblox-bc-accounts-for-free_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/hacker-minecraft-song_GM479516143.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/free-robux-wiyh-email_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/hack-roblox-juegos_GM431946152.pdf
    • https://brsolutions.pl/wp-content/uploads/fsqm-files/how-to-hack-tycoon-money-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053dc.bin
8fbe4ca336f4f69c426a788b91caa0860355e77784e3fce0d6028c250442a3a3
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53DC 25888 bytes
font_01_sfnt_off000090c0.bin
56624e41a965b33e02442574776651ebbc56d14fd3e4bfe95c3ae0db26e97c49
pdf-font-stream PDF embedded font (sfnt) at offset 0x90C0 18520 bytes