Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25c5cec1f69f210…

MALICIOUS

PDF

44.0 KB Created: 2020-04-05 08:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5cfa4758c02815171f2b739f17151909 SHA-1: 864225f919d9ee7c216d5ef56524ed4835a7d928 SHA-256: d25c5cec1f69f210345a83469d60012bc82b118dc084652388621f2ac75b9cab
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a mass external link farm. The document body, though heavily obfuscated, contains references to URLs that are also present in the extracted URL list. No scripts were extracted from this sample, limiting the ability to determine further malicious intent beyond link redirection.

Heuristics 3

  • 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.
  • 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://empiresy.com/uploads/1/3/1/4/131452913/131452913.html#factorizacion+de+cholesky+ejemplo
    • http://thefitboxhouston.com/uploads/1/3/0/2/130270945/dfb53aca8d1140f.pdf
    • http://pelarsen.dk/uploads/1/3/0/2/130289755/viremidinig.pdf
    • http://theflaminevansyahoo.com/uploads/1/3/0/7/130740325/7173357.pdf
    • http://canterburystrategy.com/uploads/1/3/0/4/130476054/fad9eec3abf0.pdf
    • http://basasmexicangrill.com/uploads/1/3/0/7/130738641/566518.pdf
    • http://maplegrovelofts.com/uploads/1/3/0/5/130551000/0dabf7c5764d062.pdf
    • http://foursomes4philanthropy.com/uploads/1/3/1/4/131438419/gegaja.pdf
    • http://thekaizenexports.com/uploads/1/3/0/3/130324072/jesajek.pdf
    • http://nyanyakrasnoyarsk.ru/uploads/1/3/1/3/131380345/verefamadamotoneli.pdf
    • http://lush-artistry.com/uploads/1/3/1/4/131407968/1358f.pdf
    • http://aliciaazagra.com/uploads/1/3/0/9/130969330/4359553.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069d1.bin
cc8fdc526b53cc0df6e880a5a09144677924ac329629c8095a89a0a466759c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D1 8948 bytes
font_01_sfnt_off00008a9c.bin
a220d41d6f5ada558b3931712822f5d3e8350bf3c3d4ac5a0418962a9806fdaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9C 16500 bytes

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