Malicious PDF — malware analysis report

Static analysis result for SHA-256 8366ad7dce6165a5…

MALICIOUS

PDF

40.6 KB Created: 2020-04-11 11:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8a24e2649fba9c85a097a41f063f5acc SHA-1: 190fef07e03431140016dac0d86dc0533732dd01 SHA-256: 8366ad7dce6165a512cdb52b9afe3c517c86acfebc8b3efca325f110e45c27fe
62 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, many of which point to other PDF files with numeric slugs, indicating a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains a reference to 'Poemas y sus caracteristicas' and the wkhtmltopdf generator, suggesting a lure to content hosted on these external sites. No scripts were extracted, and the primary malicious activity appears to be directing users to a network of potentially malicious or spam-related websites.

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://lafronterameadery.com/uploads/1/3/0/3/130323814/130323814.html#poemas+y+sus+caracteristicas
    • http://hillview.estate/uploads/1/3/0/5/130551726/wojamijusukobukoguri.pdf
    • http://campingdishwasher.com/uploads/1/3/1/1/131163617/e18695004.pdf
    • http://akanni4council.com/uploads/1/3/0/2/130289549/gikanijuxe.pdf
    • http://pinetreevillage.coop/uploads/1/3/0/9/130969164/xoranarolimabuf.pdf
    • http://entertainmentwars.com/uploads/1/3/1/3/131384424/5636f025b74d08.pdf
    • http://annamariazielinska.com/uploads/1/3/0/6/130604022/tupewefe.pdf
    • http://winebar.org/uploads/1/3/0/6/130604758/mabarinovanoximo.pdf
    • http://joinnetworkworldwide.com/uploads/1/3/0/4/130476574/gesarokokujigez_wivupu.pdf
    • http://develgolf.com/uploads/1/3/0/3/130323401/bifinawo.pdf
    • http://joinnetworkworldwide.com/uploads/1/3/0/4/130476574/ges
    • 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_off0000736f.bin
518598ef9b410be4b94ad4c381806e873df9d71846129424048b615ef06f877b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736F 9356 bytes

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