Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d52eb546f9f93af…

MALICIOUS

PDF

51.5 KB Created: 2021-06-01 08:02:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a349e6a623cf5552173957350f5a7d17 SHA-1: 564f082e289b26e6b44bd47c4b8060c7395612aa SHA-256: 1d52eb546f9f93af4c6be360d80a902a123d07699e09331fdc843614a6c64402
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, all related to obtaining free Robux or hacking the game. The primary URL, https://netcdn.xyz/app/431946152/yt-how-to-get-free-robux-without-human-verification-game-hack, likely serves as the initial lure. The heuristic PDF_SEO_LINK_FARM indicates a mass of external PDF links, suggesting a coordinated effort to distribute malicious content or redirect users to phishing sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

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/yt-how-to-get-free-robux-without-human-verification-game-hack PDF link annotation
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/roblox-free-jacket_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/guuud-info-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-get-the-golden-tuxedo-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/cheat-codes-for-roblox-pet-simulator_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-report-someone-for-hacking-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/hacking-software-for-roblox-download_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-hack-paintball-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-waiting-2021_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-robux-hack-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/free-robux-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/roblox-script-free-robux_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/robloxs-hack-site_GM431946152.pdfIn PDF document text
    • https://www.imparadigitale.it/wp-content/uploads/fsqm-files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000574a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x574A 28660 bytes
SHA-256: e5564f078105787c124c2a16d3a5bf51cc141ef7120da17629d6e92d6e3774c8
font_01_sfnt_off0000993e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x993E 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off0000a34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA34E 19552 bytes
SHA-256: 8c7807ddc72fb07e34437f24ebb43693ec2937b31ed5c01f168a202bede5787f

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