Malicious PDF — malware analysis report

Static analysis result for SHA-256 d734fc9adf6895c9…

MALICIOUS

PDF

38.8 KB Created: 2020-03-21 16:52:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bf83074dd5331e51f06f97d951e0ed61 SHA-1: 442f7ec1f16fa1d3f80a90e37dada8d4d8dd2a3b SHA-256: d734fc9adf6895c9f07bea20c07d88781fc3b92492158f2653ea3f8730659ba0
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The document body text, though partially obfuscated, includes a URL that is also present in the list of external links. This suggests the primary purpose is to act as a link farm, potentially for SEO manipulation or to distribute further malicious content via the linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://nacerparaleer.com/uploads/1/3/0/5/130543170/130543170.html#how+do+you+say+i+like+to+watch+tv+in+spanish
    • http://gykconsulting.com/uploads/1/3/0/5/130539714/pipawipikajex.pdf
    • http://chinanco.com/uploads/1/3/0/6/130639770/6168532.pdf
    • http://notwellknown.com/uploads/1/3/0/5/130539355/zibuzubitajiko_godizowexugulu_dijawulonama.pdf
    • http://poliviser.com/uploads/1/3/0/2/130270991/578ab1.pdf
    • http://jimmyironstattoo.com/uploads/1/3/0/9/130969116/votesabigo-tewosadojusi-gelatudoza-lobaza.pdf
    • http://www.cheshireneuroactive.org/uploads/1/3/1/0/131070713/fc77a4705.pdf
    • http://hongkongkahns.com/uploads/1/3/0/8/130813750/pabewilemab_zorifuvi_sidetewubaduw.pdf
    • http://greenqueenbee.com/uploads/1/3/0/4/130436390/rozekuwokiraxoki.pdf
    • http://www.buycbdoils4less.com/uploads/1/3/0/4/130436147/2466894.pdf
    • http://virtue-osity.com/uploads/1/3/0/7/130740607/e5e480af1.pdf
    • http://longlastingautodetail.com/uploads/1/3/0/9/130969795/fasenopejakuziv.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_off00006f97.bin
346b1bbfb43ef43ab22f7acc728d4b50d8a6713350dfa04c1b8765752de52a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F97 8356 bytes

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