Malicious PDF — malware analysis report

Static analysis result for SHA-256 1366cfab61c39dec…

MALICIOUS

PDF

33.9 KB Created: 2020-06-04 19:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bba9778cb811ab85cd46679f3a6e341c SHA-1: 7551239173113e08f22bf1e26bbf754b554230e3 SHA-256: 1366cfab61c39dece93734d226561dc397940453a811b2d7b1cf2c472b0c9358
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, with a significant number pointing to external PDF files. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious attack pattern.

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://littlebigshotsstables.com/uploads/1/3/0/5/130588735/130588735.html#beowulf+a+new+telling+free
    • http://ccmg.co.nz/uploads/1/3/0/2/130272513/2545489.pdf
    • http://vicariousviews.com/uploads/1/3/0/7/130739328/17282fe8c9b950.pdf
    • http://74-123-76-10.mgwnet.com/uploads/1/3/0/7/130739751/sopupedapanonunuteg.pdf
    • http://rivercrestmeetings.site/uploads/1/3/0/6/130639028/1349760.pdf
    • http://littlebigshotsstables.com/uploads/1/3/0/5/130588735/terms.html
    • http://littlebigshotsstables.com/uploads/1/3/0/5/130588735/dmca.html
    • http://littlebigshotsstables.com/uploads/1/3/0/5/130588735/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://pagapulikuv.files.wordpress.com/2020/06/nebaburogewozidojapiz.pdf
    • https://dodiguwowem.files.wordpress.com/2020/06/vuwepukikoredegopa.pdf
    • https://bimirofi.files.wordpress.com/2020/06/baxivazilidobanezerazajof.pdf
    • https://paxaweki176183565.files.wordpress.com/2020/06/jaxixopomebod.pdf
    • https://bamisenu.files.wordpress.com/2020/06/gabopekuraneba.pdf
    • https://xifamixum.files.wordpress.com/2020/06/41753056618.pdf
    • https://vupejesos.files.wordpress.com/2020/06/64729165298.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059f6.bin
fc7510d7c703231657f8796cda7f683f9d46dbdd4c406de6a9ea39ef98c6fb29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F6 10060 bytes

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