Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80399cc248cf474…

MALICIOUS

PDF

34.2 KB Created: 2020-05-15 04:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc1a5108eb245af939d008a699f2efb0 SHA-1: 5c12afdcfc77765e6035cc72a47dbae81aee68d6 SHA-256: e80399cc248cf474026fd489a856dddb23cd2ebff17599a82a2cea2ca1fbe970
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, predominantly ending in '.pdf' or '.html', suggesting a tactic to drive traffic to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains text related to 'Campbell college belfast uniform' and wkhtmltopdf, which appears to be a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://tentothirty.com/uploads/1/3/0/8/130814050/130814050.html#campbell+college+belfast+uniform
    • http://graphite.agency/uploads/1/3/0/2/130271054/1448280.pdf
    • http://schmittscs.com/uploads/1/3/0/7/130775118/83b825390ef8.pdf
    • http://centrestreetstoragellc.com/uploads/1/3/0/5/130538831/regifuwabotata_rugibimixaza_joditivu.pdf
    • http://radioscience.com/uploads/1/3/0/8/130874180/5563951.pdf
    • http://precisionbusinessenhancement.com/uploads/1/3/0/6/130621196/bisodez-texosepiw-niwanot.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_off00005ba2.bin
649684f047adaa145c7ba1a5647e8cdff37a127cbbb0004b42b4434158a269bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA2 10156 bytes

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