Malicious PDF — malware analysis report

Static analysis result for SHA-256 5447d833be6fa056…

MALICIOUS

PDF

45.0 KB Created: 2021-06-02 21:40:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 19ddd8e4ac0331c73fa6b7552c39376f SHA-1: e06bac37fcf016024efb0249e539961ab94774e4 SHA-256: 5447d833be6fa0565263aa104c340b4ba7baf1f7e7d0f4bdf333cc38433c200a
102 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'hacking' in-game items, directing users to a URL that hosts a link farm of other PDFs. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a tactic to drive traffic to potentially malicious or ad-filled sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the document.

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.xyz/app/431946152/how-to-hack-clothes-in-roblox-game-hack
    • http://www.taxiaparis.fr/images/free-robux-group_GM431946152.pdf
    • http://www.taxiaparis.fr/images/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://www.taxiaparis.fr/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • http://www.taxiaparis.fr/images/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdf
    • http://www.taxiaparis.fr/images/can-u-get-free-robux_GM431946152.pdf
    • http://www.taxiaparis.fr/images/coin-master-spin-hack-app_GM406889139.pdf
    • http://www.taxiaparis.fr/images/coin-master-free-spins-facebook_GM406889139.pdf
    • http://www.taxiaparis.fr/images/free-robux-no-verify-2021_GM431946152.pdf
    • http://www.taxiaparis.fr/images/coin-master-hack-tool-no-human-verification_GM406889139.pdf
    • http://www.taxiaparis.fr/images/roblox-its-free_GM431946152.pdf
    • http://www.taxiaparis.fr/images/best-free-minecraft-servers_GM479516143.pdf
    • http://www.taxiaparis.fr/images/minecraft-tiktok-hacks_GM479516143.pdf
    • http://www.taxiaparis.fr/images/show-me-how-to-get-free-robux_GM431946152.pdf
    • http://www.taxiaparis.fr/images/free-roblox-codes-2021_GM431946152.pdf
    • http://www.taxiaparis.fr/images/como-hackear-coin-master-2021_GM406889139.pdf
    • http://www.taxiaparis.fr/images/moonactive-free-spins_GM406889139.pdf
    • http://www.taxiaparis.fr/images/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://www.taxiaparis.fr/images/how-to-get-free-robux-2021_GM431946152.pdf
    • http://www.taxiaparis.fr/images/coin-master-latest-version-hack_GM406889139.pdf
    • http://www.taxiaparis.fr/images/how-to-get-free-robux-hack-by-stealing-information_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005300.bin
61a91bcb0049aa291c2f85f5e90f982ed7a636e2e370905b66c8c1c426dc5c05
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5300 25008 bytes
font_01_sfnt_off00008c67.bin
bdffdc7dd43d751cad289700e1c0f1e903d398625c90e9e1116d1dbdac34278b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C67 18616 bytes