Malicious PDF — malware analysis report

Static analysis result for SHA-256 766ede57bf00c11e…

MALICIOUS

PDF

59.1 KB Created: 2020-06-08 20:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ec69c754a03eb79d65f5bab91844602 SHA-1: 0be79d14ccb6269c0c1980bfecbca105d5cb9829 SHA-256: 766ede57bf00c11e5faee14f33e3004040cb0b932ca8f31272f7299b7695fca4
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. The document body, though partially corrupted, includes a URL that is also listed as an embedded URI. These links likely serve as a mechanism to redirect users to malicious websites for further exploitation or phishing. No scripts were extracted, but the presence of many external links suggests a downloader or redirector functionality.

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://chicromancetravel.voyagerwebsites.com/uploads/1/3/1/0/131070161/131070161.html#exercicios+sobre+os+povos+pr%25C3%25A9+colombianos+com+gabarito
    • http://outtashellsoutfitters.store/uploads/1/3/0/5/130546385/tomovivoruxoso-perovinov-besusixikuf.pdf
    • http://autodiscover.impactchristianfc.com/uploads/1/3/1/8/131858419/7906873.pdf
    • http://granparentsforhire.com/uploads/1/3/0/6/130620248/81696416d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://bokifib.files.wordpress.com/2020/06/pikagamivi.pdf
    • https://tovotuwag.files.wordpress.com/2020/06/bugasigufevekivapu.pdf
    • https://xukudegexe.files.wordpress.com/2020/06/47192123567.pdf
    • https://nuzipaxode.files.wordpress.com/2020/06/tezabipitituzeziduxogulop.pdf
    • https://befutawoz.files.wordpress.com/2020/06/72256094278.pdf
    • https://dumabodu.files.wordpress.com/2020/06/10678056864.pdf
    • https://gopuzesi.files.wordpress.com/2020/06/jugusologemexejor.pdf
    • https://fobitogoxonu.files.wordpress.com/2020/06/rumavoropijebukafufup.pdf
    • https://lijopiwa.files.wordpress.com/2020/06/surulalag.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b575.bin
bd2c65078991337aed1bef9e1c80889ad247314566d482bd245d380fdc66c79e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB575 13360 bytes

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