Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ff6f66d9126c62…

MALICIOUS

PDF

37.4 KB Created: 2020-05-23 04:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d089b31174150e17960b732cdb1dab14 SHA-1: 3781c99c8ffdba255dc9a5a5e179f94d948a5468 SHA-256: 32ff6f66d9126c620d68da9d5946f247f79c038800c9d3f18b2adf84e2d51f6c
94 Risk Score

Malware Insights

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

The PDF file was identified as malicious by an ML classifier with high confidence. It contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or distribution mechanism. The document body, though partially corrupted, contains a title related to 'Historia del neoliberalismo' and metadata indicating it was generated by wkhtmltopdf, which is often used to create SEO-optimized content or potentially malicious documents.

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://x0363781xstreamtravel.xsideas.com/uploads/1/3/0/9/130969358/130969358.html#historia+del+neoliberalismo+pdf
    • http://sweetpeaphotographydc.com/uploads/1/3/1/4/131437377/vunetoge.pdf
    • http://policevictimsmemorial.com/uploads/1/3/0/5/130539678/86b43d12a743f.pdf
    • http://truefitnation.com/uploads/1/3/0/2/130289669/mazam.pdf
    • http://iaminclusive.com/uploads/1/3/1/6/131606479/jekutezejes-jazuge.pdf
    • http://twindo.ca/uploads/1/3/0/6/130605390/momobiviruzidal-rajej-fedaluwi.pdf
    • http://geoffreygualano.com/uploads/1/3/0/4/130483670/6994695.pdf
    • http://jhand.shop/uploads/1/3/0/8/130873992/901d292d63d9.pdf
    • http://thecleancoconutsoapshop.com/uploads/1/3/0/7/130740522/xifamupisufav_jukaludi_kibokifonapivo_bepopixufig.pdf
    • http://loweryourratetoday.com/uploads/1/3/1/1/131164027/sonudag.pdf
    • http://befreeproduction.com/uploads/1/3/1/6/131636808/filuf.pdf
    • http://shopplexusproducts.com/uploads/1/3/0/5/130539908/4220354.pdf
    • http://minischnauzerpuppiesnc.com/uploads/1/3/1/6/131606491/baa59a487fe67.pdf
    • http://avenuethirtyfour.com/uploads/1/3/0/3/130324320/6e48e729.pdf
    • http://sherylhesseportfolio.com/uploads/1/3/0/6/130620958/gibikuvaruki.pdf
    • http://hometoroam.org/uploads/1/3/0/5/130588663/9735933.pdf
    • http://tib-feee.com/uploads/1/3/1/1/131164016/fopuzadatijuwu-tidusi.pdf
    • http://theradicallygood.com/uploads/1/3/0/6/130621510/powetud.pdf
    • http://vincenttsaiarts.com/uploads/1/3/1/3/131382430/dirozuwiwobif-dawatekowete-sokase.pdf
    • http://emaileducation.org/uploads/1/3/0/8/130813846/fa6fa.pdf
    • http://rollonfaith19.org/uploads/1/3/0/5/130539205/jarumibumiwew.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_off0000659c.bin
4e10a2e2e8a396c118e0fc565cfc4677c484adca16c5f10c425e48991dde442f
pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 10572 bytes