Malicious PDF — malware analysis report

Static analysis result for SHA-256 575d74d969c593fb…

MALICIOUS

PDF

30.9 KB Created: 2020-05-13 04:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e85e6a7666f8201a28541a3f860cf3d8 SHA-1: 09ed1a47f4c426417bc546de8fe8e1759d794ab9 SHA-256: 575d74d969c593fbcbcb1bfd7cc578c593a2f95711a91437085d5993b4bb99fa
96 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, suggesting the document's primary purpose is to distribute a high volume of links, likely for SEO manipulation or to host malicious content. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://bigdsuperfoods.com/uploads/1/3/0/3/130323900/130323900.html#chandra+chakori+movie+video+songs
    • http://freeboatercard.com/uploads/1/3/0/7/130738771/ribabinonorovegiki.pdf
    • http://tordownstorage.com/uploads/1/3/0/7/130775357/zaraxiwapaxizibuwud.pdf
    • http://semester-rentals.com/uploads/1/3/0/7/130738706/6798589.pdf
    • http://jasongreenechilds.net/uploads/1/3/0/7/130776067/vodamuxuvofib.pdf
    • http://allamericanjeepclub.com/uploads/1/3/0/5/130546294/0925eb4d7.pdf
    • http://childresschix.com/uploads/1/3/0/3/130323794/d14ec40843fa54.pdf
    • http://ghrmarineservices.com/uploads/1/3/0/8/130814718/6806b874c79.pdf
    • http://oxfordonrideau.ca/uploads/1/3/1/4/131453414/3511504.pdf
    • http://thomasmayberry.com/uploads/1/3/0/2/130291910/nalalorukujek.pdf
    • http://roxandree.com/uploads/1/3/1/4/131453592/dixazifi.pdf
    • http://elitelubrication.com/uploads/1/3/1/1/131163601/difumesubis.pdf
    • http://nathannegri.com/uploads/1/3/1/1/131164471/8891578.pdf
    • http://mypapco.com/uploads/1/3/1/4/131483772/5286266.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004eb9.bin
c3c75aa22adbceb7e561e636a5df7ddfcf7729ef73e729284a13154e4c401d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EB9 9824 bytes

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