Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce61a834a20b842…

MALICIOUS

PDF

47.0 KB Created: 2021-05-16 05:18:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b95f5f0ed9412f00d1aeda6ee861b3db SHA-1: 0f215f040d409db52cc56885dc0b05bf82bbd98c SHA-256: 3ce61a834a20b842ac82daab68e4b4d50f8f94962a13025f568dfa58903cc983
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external PDF files, many of which appear to be SEO-optimized lures for free Robux or other game-related items. The presence of a download button lure and the ML classifier flagging this PDF as malicious strongly suggest a malicious intent. The primary goal appears to be directing users to download further malicious content disguised as helpful guides.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-get-free-robux-without-download-apps-or-survey-game-hack
    • http://www.taxiaparis.fr/images/roblox-its-free_GM431946152.pdf
    • http://www.taxiaparis.fr/images/robux-place-rewards_GM431946152.pdf
    • http://www.taxiaparis.fr/images/how-to-get-free-robux-generator_GM431946152.pdf
    • http://www.taxiaparis.fr/images/how-to-get-free-roblox-money_GM431946152.pdf
    • http://www.taxiaparis.fr/images/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdf
    • http://www.taxiaparis.fr/images/how-to-get-free-robux-games_GM431946152.pdf
    • http://www.taxiaparis.fr/images/how-to-get-free-robux-on-iphone_GM431946152.pdf
    • http://www.taxiaparis.fr/images/what-is-robux-in-roblox_GM431946152.pdf
    • http://www.taxiaparis.fr/images/how-to-hack-roblox-passwords_GM431946152.pdf
    • http://www.taxiaparis.fr/images/minecraft-free-download-laptop_GM479516143.pdf
    • http://www.taxiaparis.fr/images/mcpe-free-download_GM479516143.pdf
    • http://www.taxiaparis.fr/images/minecraft-windows-free_GM479516143.pdf
    • http://www.taxiaparis.fr/images/free-spins-for-coin-master_GM406889139.pdf
    • http://www.taxiaparis.fr/images/minecraft-cracked-client_GM479516143.pdf
    • http://www.taxiaparis.fr/images/coin-master-free-spins-hack-2021_GM406889139.pdf
    • http://www.taxiaparis.fr/images/how-to-downgrade-minecraft-pe_GM479516143.pdf
    • http://www.taxiaparis.fr/images/how-to-get-free-robux-without-verification_GM431946152.pdf
    • http://www.taxiaparis.fr/images/how-many-levels-does-coin-master-have_GM406889139.pdf
    • http://www.taxiaparis.fr/images/game-hack-coin-master_GM406889139.pdf
    • http://www.taxiaparis.fr/images/do-robux-generators-work_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c3e.bin
f44568b93f8978c1aeacf71d856c2e525322bb6def2321b652d82a70d51670de
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C3E 24596 bytes
font_01_sfnt_off00008418.bin
bf6aaaa14203a4129428cfd6622c1c3831c774ba36d143ff8c80607388ff9b2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8418 3528 bytes
font_02_sfnt_off0000908f.bin
a2325719e7076f7032f87f435cdda87ec67b0b67db20430c9492992df634e2b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x908F 19880 bytes