Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ff83288574535e…

MALICIOUS

PDF

33.4 KB Created: 2021-06-27 19:20:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b5a17d0b2d32efcfcd9befe78fa2b52c SHA-1: be763946e32e929041413930591bcfea3afdce00 SHA-256: 32ff83288574535ebef912e6b0b4d61d70061f155014bf0fb0b3a5c63bc6c8fe
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that lures users with promises of free game codes and hacks for popular games like Roblox and Coin Master. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm designed to redirect users to potentially malicious sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the document, likely serving as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/free-roblox-card-codes-2021-no-survey-game-hack PDF link annotation
    • https://admin.9credit.vn/data/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/on-roblox-adopt-me-how-do-u-hack-someones-pet_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/what-is-the-best-free-game-script-executor-roblox_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-robux-obby-august-2021_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/comment-hacker-et-avoir-des-robux-gratuitement_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/guest-login-hack-roblox_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-do-you-get-robux-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/tiroblox-cheats-for-robux-and-tix-robloxcheatsnet_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-buy-robux-for-free_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_off00002b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B06 22076 bytes
SHA-256: cecf9b0ba5246465c208bf3e59db06bcf03c2362cc7de13dd9818e2b24999c8f
font_01_sfnt_off00005bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAB 19660 bytes
SHA-256: f8d41afeaf04e46c6a6cdc79a4f3269bfdd1323499eea6f53c103b53cf631fd5

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