Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b6dbdc988dd14a…

MALICIOUS

PDF

55.0 KB Created: 2020-05-14 10:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 26f57348305aa3c36fbd7c91a1dfb582 SHA-1: 685f104a37a602492e4aec07d0a0439df66abafa SHA-256: 47b6dbdc988dd14ab2d6e36cf8e857266507993d8fc5cdfeb356a6fe746862c4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The embedded document body text is heavily obfuscated and appears to be junk data, but the presence of numerous external links suggests a lure or SEO spamming campaign. No scripts were extracted from this sample.

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://xciteeducation.com/uploads/1/3/0/2/130287835/130287835.html#persona+5+confidant+guide+ann
    • http://mhrinvestments.com/uploads/1/3/0/7/130738727/nosakafuwa.pdf
    • http://johnnyrelle.com/uploads/1/3/0/8/130874620/mizivajubegop_zopilo_nekaxeli.pdf
    • http://bcschools.org/uploads/1/3/0/2/130270955/getisanixulux.pdf
    • http://bflairsoft.com/uploads/1/3/0/2/130289241/zatup.pdf
    • http://intravireshealth.com/uploads/1/3/1/6/131636862/nanokokekozirafa.pdf
    • http://ancientsecretsteacompany.com/uploads/1/3/0/6/130639493/2429922.pdf
    • http://saskatoonchristmasparty.com/uploads/1/3/1/3/131383444/8770d62962acc.pdf
    • http://lichenconsulting.ca/uploads/1/3/0/9/130969511/087edb99da6.pdf
    • http://noscopegaming.net/uploads/1/3/0/5/130551896/7b0832aa8c8d77.pdf
    • http://gridsat.org/uploads/1/3/0/6/130622066/3fd03544.pdf
    • http://steinbachs.net/uploads/1/3/0/6/130604585/1687080.pdf
    • http://danielleharrislaw.com/uploads/1/3/0/2/130289655/kepoxizopakaj.pdf
    • http://right2bear.org/uploads/1/3/0/2/130270799/1796565.pdf
    • http://nomoreheroesnovel.com/uploads/1/3/0/5/130539886/21925e47.pdf
    • http://roofing-marketers.com/uploads/1/3/1/4/131483343/fubenogexuzizux_vubotimujoduvux_zoduw.pdf
    • http://brian-amos.com/uploads/1/3/0/6/130639347/9687659.pdf
    • http://currysunlimited.com/uploads/1/3/1/4/131454733/gitopof_vavaburisene.pdf
    • http://daniel-moran.org/uploads/1/3/1/0/131070327/5931791.pdf
    • http://marcdyen.com/uploads/1/3/0/7/130739021/66345d8.pdf
    • http://omwin88.com/uploads/1/3/0/9/130969888/61e232d4.pdf
    • http://artekcm.com/uploads/1/3/0/6/130620797/xutifanurubetoba.pdf
    • http://livestheproject.com/uploads/1/3/0/5/130539763/7026966.pdf
    • http://bluetyphoonbarandgrill.com/uploads/1/3/1/4/131453867/jofibenew.pdf
    • http://riskdataconsult.com/uploads/1/3/0/6/130621280/779bc.pdf
    • http://lephokastro.com/uploads/1/3/0/5/130547486/vojegobajemen-ropixulovozopi.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_off0000abe2.bin
6d32b98bc6f40b06c668dc4ee2a198aef36c181a835d8049df14634178587482		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABE2 10364 bytes

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