Malicious PDF — malware analysis report

Static analysis result for SHA-256 5102aabf03bf05fb…

MALICIOUS

PDF

31.8 KB Created: 2020-04-19 08:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cd9ca52954a6ccf9bedc7a3327d61b9f SHA-1: 2d9184f955f56d633e3cdd39d8b6c54668213860 SHA-256: 5102aabf03bf05fbc961a804abed7d7dcfb71674afca85fd6efe322f174a3f18
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, indicative of a link farm or SEO spam campaign. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to URLs that are also present in the heuristics, suggesting a coordinated effort to direct users to potentially malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

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://medconnectnz.com/uploads/1/3/0/8/130874520/130874520.html#colouring+worksheets+for+year+1
    • http://greatamericanattorneys.com/uploads/1/3/0/7/130738771/4467665.pdf
    • http://michaelmkrueger.net/uploads/1/3/0/6/130640081/wepumugodoxelorixa.pdf
    • http://foundationrepairkingston.ca/uploads/1/3/0/4/130476060/lamajojegujoto-xitawa-lulalete-lafowawozo.pdf
    • http://hermpena.com/uploads/1/3/0/6/130620542/fixunirileg_wifojikufesiwa.pdf
    • http://eugeneglassroots.com/uploads/1/3/0/7/130776757/manokawe.pdf
    • http://prettykeyaconcepts.com/uploads/1/3/0/9/130969563/2707132.pdf
    • http://thegreenlightmovement.com/uploads/1/3/1/4/131453010/zikisoruxa-zetitegaze-sunaj-zuvofisefirekim.pdf
    • http://bioimpedanciamedica.com/uploads/1/3/0/9/130969048/tubokafu.pdf
    • http://cv-steelhead.com/uploads/1/3/0/2/130271207/3145460.pdf
    • http://bioimpedanciamedica
    • 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_off0000562f.bin
c0d826bd5a7c222a8980695afe76dfeae5efee07819ff095bb330979bd4f3faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x562F 7492 bytes

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