Malicious PDF — malware analysis report

Static analysis result for SHA-256 faded52107997f9c…

MALICIOUS

PDF

44.3 KB Created: 2020-04-23 00:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 77158343ae5cc4490420f8df08e8f364 SHA-1: 2a1374a602ca0013d4c13aea22746b8e0a932af1 SHA-256: faded52107997f9cbceb1b93063528270d66fb58d5dfd8521fed11ae6021ec48
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links, such as http://dogtownrva.com/uploads/1/3/1/3/131398010/131398010.html#class+dojo+student+reports and http://livingprioritylife.com/uploads/1/3/0/7/130775834/ziwejorawasefazari.pdf, are likely intended to redirect users to malicious websites or download further malware. No scripts were extracted from this sample.

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://dogtownrva.com/uploads/1/3/1/3/131398010/131398010.html#class+dojo+student+reports PDF link annotation
    • http://livingprioritylife.com/uploads/1/3/0/7/130775834/ziwejorawasefazari.pdfIn PDF document text
    • http://juniorstilemarblandgranite.com/uploads/1/3/0/4/130476074/4680346.pdfIn PDF document text
    • http://whatstrendingaccounting.com/uploads/1/3/1/6/131637175/d3bf2b.pdfIn PDF document text
    • http://consplayers.com/uploads/1/3/0/4/130489054/fadovezik.pdfIn PDF document text
    • http://arevolutionstudio.com/uploads/1/3/1/4/131453967/gupakebu.pdfIn PDF document text
    • http://curerecords.net/uploads/1/3/0/6/130620542/8079474.pdfIn PDF document text
    • http://shoplegarebeauty.com/uploads/1/3/0/6/130622058/jodutoguwem-rikuba-bafesoxuwe-nuxojezeto.pdfIn PDF document text
    • http://lovelepink.com/uploads/1/3/0/5/130588834/fafakusoxajopob.pdfIn PDF document text
    • http://pioneervalleywritersworkshop.com/uploads/1/3/1/4/131483327/zoxubu.pdfIn PDF document text
    • http://pingrail.com/uploads/1/3/0/7/130776267/fepuberadaxid_fubudujogevu_jasoreropu_fotonol.pdfIn PDF document text
    • http://xualiapp.com/uploads/1/3/0/7/130775219/d2a8d09.pdfIn PDF document text
    • https://teach.comIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E21 8600 bytes
SHA-256: a5023d5222f4173888b99b033e702ff9645bf8af4b4edb66ec6a9f50073be437
font_01_sfnt_off00008ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF3 16384 bytes
SHA-256: ac49849b978058f48725d089179747450f7987fdfd4cddbc63fac11af8b99083