Malicious PDF — malware analysis report

Static analysis result for SHA-256 4566d85be53a8f33…

MALICIOUS

PDF

44.3 KB Created: 2021-05-11 23:04:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: af10dc0cc2bc57fbb89cb740804437cd SHA-1: afde33c9c62d0f63ab58494a2e97ddcb881d6fac SHA-256: 4566d85be53a8f33ae0be809c4f0318accc545195de5006468792fcca5bad226
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDF files with SEO-like titles related to games and free items. One embedded URL, https://netcdn.xyz/app/406889139/coin-master-100-spin-slot-game-hack, suggests a potential lure for users seeking in-game advantages. The heuristic firings indicate this is likely part of a link farm or SEO spam campaign, potentially distributing malware or leading to phishing sites.

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 https://netcdn.xyz/app/406889139/coin-master-100-spin-slot-game-hack PDF link annotation
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/mcpe-116_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/minecraft-pe-hack-client-ios_GM479516143.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
stream_003_off00004ba9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA9 26660 bytes
SHA-256: 3763c29f3da335c2cf559f59ef02e125665c067195f5d1effa199e3f379a285e
font_01_sfnt_off000087c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C2 19328 bytes
SHA-256: c3104a0b403c98ede6af1276925a670d9a523790e242a6ab2e0fca3ed1c67216

Open this report in the interactive analyzer, or submit your own file for analysis.