Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bccf6c3d30bd78…

MALICIOUS

PDF

40.8 KB Created: 2020-03-30 08:27:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 97f1b1960f08ad5c1369a484fe5965b7 SHA-1: 396da9d02725d09e91e668cb8770d67f1d390aaf SHA-256: 60bccf6c3d30bd784ee7afd475b48367f67da96bbded3e1bd69344b6ad622cf9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links to external websites, a technique often used for SEO manipulation or to host malicious payloads. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While no scripts were directly extracted, the structure and numerous external links suggest the document's primary purpose is to redirect users to potentially harmful content hosted on these external domains.

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://nobuhotelmarbella.devsite-1.com/uploads/1/3/0/4/130489144/130489144.html#enfoque+humanista+en+educacion+inicial
    • http://apexresidential.net/uploads/1/3/0/4/130476141/c91bc213.pdf
    • http://garagedoorrepair-newport-beach-ca.com/uploads/1/3/0/6/130622041/wefotuguve.pdf
    • http://miamirehearsal.com/uploads/1/3/1/3/131382382/1459590.pdf
    • http://ipoftexaslaw.com/uploads/1/3/0/5/130588345/rukixara.pdf
    • http://whymegandoonan.com/uploads/1/3/0/5/130539120/64946bd.pdf
    • http://victorgtz.com/uploads/1/3/0/8/130813032/titogefifilawosome.pdf
    • http://rizingplaylists.com/uploads/1/3/0/6/130620981/fogilagedow_datumidonitug_pinef.pdf
    • http://cozyasatoast.com/uploads/1/3/0/3/130324192/8c05a.pdf
    • http://gspillis.com/uploads/1/3/0/6/130620795/kuvexigibivu.pdf
    • http://simple-dimensions.com/uploads/1/3/0/5/130590325/gutobikajekalin.pdf
    • http://autodiscover.bestfriendstalent.com/uploads/1/3/0/7/130740077/nuruxomeni.pdf
    • http://parkerinvitedesigns.com/uploads/1/3/0/6/130604740/difov_bazilokedo_podusorozobi.pdf
    • http://sunrisesouthfishingcharters.com/uploads/1/3/0/3/130323286/6ee9730da68.pdf
    • http://surgicalinfectionprevention.com/uploads/1/3/0/3/130312971/zibexanufobe-pigixeg.pdf
    • http://carolinaartiststudio.org/uploads/1/3/0/6/130603983/miputarumo.pdf
    • http://kandeboutique.com/uploads/1/3/0/5/130589229/foxuvovejedowunagov.pdf
    • http://epiccrane.com/uploads/1/3/0/8/130874254/2526796.pdf
    • http://jlpventures.com/uploads/1/3/0/7/130775180/fizuke.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_off00007449.bin
a2e5f5153732ff08f5dc288f43e2b87a7941b2b24a0fd161d42cd90854e602a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7449 8644 bytes

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