Malicious PDF — malware analysis report

Static analysis result for SHA-256 b56112ebc622073e…

MALICIOUS

PDF

36.4 KB Created: 2021-06-20 19:44:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2bb92702e1fbc75fe99b69e2fecf8b2f SHA-1: 276bdc388d401069809f15b54f749dd896546155 SHA-256: b56112ebc622073ef2cf54381e567b6e520cfcad3881fb8f615272d3428780c3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links, presented as download opportunities for game hacks and cheats, which is a common lure for malware distribution. The ML classifier strongly indicated maliciousness, and the presence of a "download button" heuristic further supports this. The document's primary function appears to be directing users to external sites that likely host malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/roblox-protosmasher-free-download-game-hack PDF link annotation
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-phantom-forces-credits-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-to-hack-roblox-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-much-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-hack-de-inspeccionar_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-game_GM406889139.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-pastbin-hack_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-delitive-mod-cheat-codes_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/name-that-character-roblox-cheats_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_off00003327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3327 23204 bytes
SHA-256: f666dac3e1cbc89c48dd6eba064d1d73475f7f12326a27edbbc6f2560c84771c
font_01_sfnt_off00006712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6712 19840 bytes
SHA-256: 2ff54dc8c6259ca53a733a23705e049764c1e492e81b15516b9357cbdcdd10a3