Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b6df95c005d5ea…

MALICIOUS

PDF

43.9 KB Created: 2020-06-12 14:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d37ba71e3b363297bcb7bab4a9a386e9 SHA-1: 38ad973cd57f4dad8d1fa9d6dc3461558b832634 SHA-256: c8b6df95c005d5eae1e3288b47bfd40544e37bc5bcf66c50cc2dcd25f7929250
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique commonly associated with SEO poisoning to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links suggests a content-delivery or redirection mechanism.

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://andreanolyons.com/uploads/1/3/1/8/131872155/131872155.html#ileti%25C5%259Fim+dersi+notlar%25C4%25B1
    • http://roadkill17.com/uploads/1/3/1/0/131069766/musuvikude-tujitupupapiput.pdf
    • http://lmgtrading.com/uploads/1/3/0/8/130873709/gujiju-lefom-vawefufanija-wakekuzetumis.pdf
    • http://hdfamilydentistry.org/uploads/1/3/0/7/130775023/1093536.pdf
    • http://74-123-79-50.mgwnet.com/uploads/1/3/0/3/130313363/1383520.pdf
    • http://thompsonthyme.com/uploads/1/3/0/2/130270934/8940146.pdf
    • http://heavykevys.ca/uploads/1/3/0/4/130488498/637d65ab.pdf
    • http://homevisitcomputers.com/uploads/1/3/0/7/130776415/kesudotiwakopoxej.pdf
    • http://dynamicstrings.net/uploads/1/3/1/4/131453330/c5a43c2f5.pdf
    • http://crystal-parks.info/uploads/1/3/1/3/131398348/5317eff2dbdc254.pdf
    • http://mail.aero-scale.com/uploads/1/3/0/2/130270966/dufuger.pdf
    • http://cbmusicandrepairguy.com/uploads/1/3/0/6/130604213/5735375.pdf
    • http://mta-sts.mlrosado.com/uploads/1/3/1/3/131381055/4003128.pdf
    • https://fanutuzak499104460.files.wordpress.com/2020/06/somuxifadutibiliwuv.pdf
    • https://zezumova.files.wordpress.com/2020/06/69323658169.pdf
    • https://poginuwikola.files.wordpress.com/2020/06/83755849612.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_off00007b7d.bin
51bd054d457b14c290294d6bc4b73efa740ca88bace5f16652d9578edc507510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7D 12548 bytes

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