Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec063bcc73d71b71…

MALICIOUS

PDF

41.8 KB Created: 2021-05-16 03:33:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fce1e09258eabab09758f42382518fb3 SHA-1: 2b1a4c7942a860540a3f5da61499c15aee48ae52 SHA-256: ec063bcc73d71b716936c1950d8b0be64d4a07d079eb8aa82a4d1f460cf4b8fa
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, identified as a link farm, pointing to various websites offering game cheats and hacks. The document body, though partially obfuscated, contains URLs related to 'coinmaster' and 'roblox' hacks, and the PDF_URI heuristic also flagged a suspicious URL. These elements strongly suggest a phishing or scam attempt designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coinmaster-spin-ml-game-hack PDF link annotation
    • http://advancedaudiosystems.org/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A22 24748 bytes
SHA-256: b3ad8ab64413a0f13e7c4194ab3cbccc0c1f970de7e82ccf960b5d0ebf5bfde4
font_01_sfnt_off000081e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E1 18056 bytes
SHA-256: 064134117864f7541fed544d899877d9437d618d81879e9055ccf00f3d226253

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