Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c783719ffb80d2…

MALICIOUS

PDF

42.5 KB Created: 2020-03-17 17:07:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f62d27e047912fe50ed2dfc16b123202 SHA-1: febbcdf01554e712b36454099aae735108885716 SHA-256: 57c783719ffb80d21b4ddc8ee0758f19416b0d45537e5127bbb0cf8c550bfda6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, many of which point to other PDF files on various domains. The document body mentions 'Hiperplasia de prostata grado iv', suggesting a lure related to medical information. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to a network of linked websites, likely for SEO spam or to host further malicious content.

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://hplministries.org/uploads/1/3/0/2/130270743/130270743.html#hiperplasia+de+prostata+grado+iv
    • http://925sterlingboutique.com/uploads/1/3/0/6/130639474/1025554.pdf
    • http://jairroofcleaning.com/uploads/1/3/0/9/130969182/gejozoja.pdf
    • http://davidhoover.net/uploads/1/3/0/4/130476317/ef5a28e537d26.pdf
    • http://himagazineonline.com/uploads/1/3/0/6/130639155/2963480abb.pdf
    • http://kingramseysbitters.com/uploads/1/3/0/5/130589006/e2e451eae84dd.pdf
    • http://www.casavidalahabana.com/uploads/1/3/0/6/130639300/b5948175d5.pdf
    • http://teachertrainingforyoga.com/uploads/1/3/0/8/130874670/wazumebawexozo-noxes.pdf
    • http://www.naomiwhiteheadtraining.com/uploads/1/3/0/6/130620585/fusedumirimuxe.pdf
    • http://mta-sts.mx.alanauto.com/uploads/1/3/0/6/130621369/436985.pdf
    • http://code-camp.ru/uploads/1/3/0/5/130588867/c4a73b6.pdf
    • http://dustinconlonphotography.org/uploads/1/3/0/6/130621666/0c0f72d3f1c9f9.pdf
    • http://menshairreplacementnc.com/uploads/1/3/0/6/130605517/xegosebiziwuked.pdf
    • http://elsoldadolatino.com/uploads/1/3/0/2/130291827/cde8f6166f1e.pdf
    • http://holisticmassagetraining.org/uploads/1/3/0/5/130538996/1151086.pdf
    • http://thirdimapping.com/uploads/1/3/0/6/130604515/nabujugoros.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_off00007c15.bin
c7845d0a149ad7789c97af8298a367b635d601888e44400083c9161663f2a381		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C15 8516 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.