Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d082883cb00827…

MALICIOUS

PDF

37.4 KB Created: 2020-04-04 12:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e14fd71ef8982cfc6672cd0b30a64e13 SHA-1: b359d9e20e554b0948b6e227ed44260d444388e6 SHA-256: 39d082883cb008276b67ad6b9ed187328d22149cebde4b19f848758f453aae24
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm designed to distribute malicious content or phish for credentials. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://stratford-hvac.com/uploads/1/3/0/7/130776457/130776457.html#ejemplos+de+sistema+cerrados+y+abiertos
    • http://politicalpaige.net/uploads/1/3/0/6/130604958/5e796bd0c5af.pdf
    • http://losangelesregionyouthbuildcollaborative.org/uploads/1/3/0/7/130775750/dalamet.pdf
    • http://rememberproperty.com/uploads/1/3/0/6/130604425/7b235d34be5.pdf
    • http://jeymtl.com/uploads/1/3/1/3/131383854/5908010.pdf
    • http://cocktailsexpress.com/uploads/1/3/0/6/130621437/fuxanixezovuraki.pdf
    • http://kayandmay.com/uploads/1/3/0/3/130312919/seminuminag-jenigi-namepefumakiwu-guzaligov.pdf
    • http://gingerlockhart.com/uploads/1/3/0/5/130542831/figujijoremoga-vewawaba-gakuxisewuvej.pdf
    • http://missiandme.com/uploads/1/3/0/6/130640074/vubewegamu.pdf
    • http://cateringbymezzos.com/uploads/1/3/1/4/131482864/7786465.pdf
    • http://daves-woodcrafts.com/uploads/1/3/1/1/131164481/741490.pdf
    • http://dallasanddelilah.com/uploads/1/3/0/3/130323212/genukepoxem.pdf
    • http://niagarafallsseacadets.com/uploads/1/3/0/7/130775528/nebusuzojaxiriramoxe.pdf
    • http://propaintingandstaining.com/uploads/1/3/0/7/130739778/6819624.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_off00006bfd.bin
60f5c6c91b843348c7678d506163b76e39b720b5cf676ccb7107c1809efd4350		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFD 7156 bytes

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