Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ab7b3850b77a81…

MALICIOUS

PDF

33.4 KB Created: 2021-06-30 09:30:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 680c5dc4fed96a68a6e694e4fa4c15b1 SHA-1: 585ba19256514f73ddba47c6760d5358065fd214 SHA-256: 87ab7b3850b77a814d479718133cb18b7b2764cda84ee568175e3e88e5779168
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDFs, suggesting a link farm designed to attract users searching for game hacks. The primary URL http://netcdn.co/app/431946152/hack-para-roblox-youtube-game-hack likely hosts a malicious payload. The presence of a visual download button lure further supports the malicious intent.

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/hack-para-roblox-youtube-game-hack PDF link annotation
    • https://perpustakaan.stifar.ac.id/repository/how-to-cheat-on-roblox-tycoons-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/jeux-de-hacking-sur-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/filled-surveys-for-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-any-free-robux-item_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-roblox-accounts-on-ipad_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/comment-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-hack-on-computer_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-cheats-for-iphone_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-gift-card-in-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-hunter-x-hunter-lvl-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/can-i-have-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-roblox-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/robux-hack-free-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B81 22392 bytes
SHA-256: ba6c24398570c1b96b696acd2ca64e651fc07bd1873343a23ab1cdda33cf94a2
font_01_sfnt_off00005d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D29 19216 bytes
SHA-256: 3fc929fef563990c6821092b1fa6dd74b66a906b33401556daf9ffe37c96b6db

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