Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5d18dd6f70d332…

MALICIOUS

PDF

59.9 KB Created: 2022-11-30 17:23:26 +00:00 Authoring application: darame (via mPDF 8.1.2) First seen: 2023-12-11
MD5: b7f5c6ed6b28dffc70c5a2c75d3ec4ea SHA-1: 563afb4a17d45f8c0098c913b7179bf74f6f84a6 SHA-256: 4c5d18dd6f70d332f1251306dadf619774ab7559a9f7fede7e2fc87bbf6968e1
104 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0006

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.
  • PDF links to a cracked-software download doorway (base64-obfuscated) high PDF_CRACKED_SOFTWARE_DOWNLOAD_DOORWAY
    PDF's embedded link hides a pirated-software title as a base64 blob inside the URL path/query (and/or carries the ``download|`` doorway-template marker), rather than in visible text. This is a TCPDF-generated SEO doorway that ranks for software-piracy searches and funnels users to fake 'crack/keygen' download pages distributing adware, potentially-unwanted programs, or droppers. The base64 encoding is deliberate obfuscation to evade plaintext lure rules; the PDF itself carries no parser exploit — the risk is the linked crack-download destination.
  • 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://starsearchtool.com/?ZG93bmxvYWR8am04TW1FeWNueDhNVFkyT1RneU5Ea3pOSHg4TWpVNU1IeDhLRTBwSUZkdmNtUndjbVZ6Y3lCYldFMU1VbEJESUZZeUlGQkVSbDA=carted&QXV0b0NBRAQXV=charmed.tartarian/diversity...dwarfed/crates PDF link annotation
    • https://elolist.com/wp-content/uploads/2022/11/AutoCAD-25.pdfIn PDF document text
    • https://www.sprutha.com/wp-content/uploads/2022/11/AutoCAD__Crack___Keygen_WinMac.pdfIn PDF document text
    • https://rednails.store/wp-content/uploads/2022/11/AutoCAD-31.pdfIn PDF document text
    • https://www.johndhunt.com/wp-content/uploads/2022/11/AutoCAD-5.pdfIn PDF document text
    • https://nightshow.pro/wp-content/uploads/2022/11/AutoCAD-77.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn extracted file (stream_006_off00002e22.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_006_off00002e22.bin)

Related samples 8

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
stream_006_off00002e22.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E22 20308 bytes
SHA-256: 19353de6181fad8c3524d4e43fd36420381e1c2c45fb9ffc70bfe37f25b33b51
font_01_sfnt_off00006342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6342 19964 bytes
SHA-256: 5154a7c8cf7a9b55c2f939ad6a4a8f8327cd6552b9f68a87c49d10dfc747eaa8

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