Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9844e4e976544a…

MALICIOUS

PDF

40.0 KB Created: 2020-03-24 12:09:35 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 64e0acaa462cfc73bdd065b9e548c514 SHA-1: 565c448464f1f729fe762facb254bb25ea6ba52d SHA-256: db9844e4e976544ad6005273362826011573084c086172dc70dff7b87cf5eba5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body contains garbled text and some embedded URLs, including one that appears to be an HTML page and others that are PDF files. The primary intent appears to be directing users to these external resources, which could host malicious content or be part of a larger distribution scheme.

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://thismaycomeinhandy.com/uploads/1/3/0/7/130775557/130775557.html#unilateralidad+y+bilateralidad+ejemplos PDF link annotation
    • http://miguelcbt.com/uploads/1/3/0/7/130775856/1885148.pdfIn PDF document text
    • http://roadiesrule.com/uploads/1/3/0/4/130435939/mowuroli.pdfIn PDF document text
    • http://superiormanor.com/uploads/1/3/0/5/130545557/jaxenazirubofe.pdfIn PDF document text
    • http://shahrizai.com/uploads/1/3/0/2/130288386/6661153.pdfIn PDF document text
    • http://www.sparkleofchange.com/uploads/1/3/0/6/130620910/7992297.pdfIn PDF document text
    • http://roofinggermantown.com/uploads/1/3/0/5/130539992/ratoguxasoruzopu.pdfIn PDF document text
    • http://79.bpmtc.com/uploads/1/3/0/8/130814591/kuwetuk-pukawetol-wasalumixadi-paxesetawasuve.pdfIn PDF document text
    • http://curiosityandwonder.org/uploads/1/3/0/8/130814856/185d5b8a3.pdfIn PDF document text
    • http://namisa-espanol.org/uploads/1/3/0/2/130291491/d12c755.pdfIn PDF document text
    • http://chesschildrenllc.org/uploads/1/3/0/2/130272577/6906705.pdfIn PDF document text
    • http://nuancetravelacademy.com/uploads/1/3/0/6/130605515/gokaroneb-fasuwejavegurul-femokazaw.pdfIn PDF document text
    • http://mta-sts.newportchurchofgod.org/uploads/1/3/0/2/130288554/5fcb9.pdfIn PDF document text
    • http://loto2019.site/uploads/1/3/0/5/130541662/41253c647b7.pdfIn PDF document text
    • http://skialliejohnson.com/uploads/1/3/0/3/130313026/pikujekigodoji.pdfIn PDF document text
    • http://suumc.com/uploads/1/3/0/4/130489149/nobenano_nikojox_vunow_rozel.pdfIn PDF document text
    • http://www.testasqhdandl.org/uploads/1/3/0/5/130590666/47bc79.pdfIn PDF document text
    • http://melanieartist.com/uploads/1/3/0/6/130604488/9c54f878dcebcf6.pdfIn PDF document text
    • http://littletulipbooks.com/uploads/1/3/0/5/130589342/f8035.pdfIn PDF document text
    • http://antoniogiulioloforese.com/uploads/1/3/0/5/130550915/4421167.pdfIn PDF document text
    • http://sandiegovolleyballcamp.com/uploads/1/3/0/7/130740165/ef391274.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000731d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x731D 7964 bytes
SHA-256: 3f8d2f2f3ed2b8e27e9948d8e8d2158e07fb2fc93b5a1100ad8552fec3fca554

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