Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb47a107c11deed…

MALICIOUS

PDF

145.6 KB Created: 2020-06-15 00:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 74b16479c7a835e2a6f2554f7ee3a52a SHA-1: 5083c757009a55af93121c8fa14542ed5fa96896 SHA-256: cfb47a107c11deed85627885c41bf2e854c60b3b94bbf674964456a221a657c6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The document body also contains a specific URL related to 'Codex necrons 6th edition pdf', which is likely a lure. The embedded URLs are likely used to redirect users to malicious content or phishing pages.

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://yonkersediting.com/uploads/1/3/0/5/130551795/130551795.html#codex+necrons+6th+edition+pdf PDF link annotation
    • http://robertavieira.net/uploads/1/3/0/5/130551309/riduzurifedum-buzojudumepe.pdfIn PDF document text
    • http://blessedsweettreats.com/uploads/1/3/1/6/131637175/gupefolef.pdfIn PDF document text
    • http://designsbycyndylou.com/uploads/1/3/0/6/130620341/nusifebupumow_nekonoroge_pafaja_fuwugejuwigekib.pdfIn PDF document text
    • http://calvinmousavi.com/uploads/1/3/1/4/131406071/dd58bf72.pdfIn PDF document text
    • http://thesperobrand.com/uploads/1/3/0/6/130621296/a7ed6f42d60e.pdfIn PDF document text
    • http://pucukji.com/uploads/1/3/0/5/130589320/firamuwowakoraw.pdfIn PDF document text
    • http://westernjules.com/uploads/1/3/0/6/130639776/xogupudiwadubi.pdfIn PDF document text
    • http://ingasbakeshop.com/uploads/1/3/0/5/130588723/besexa-jozulini.pdfIn PDF document text
    • http://tanheeming.com/uploads/1/3/0/6/130603810/xobowawokivivew-mapivafujufej-sulukanobokemar.pdfIn PDF document text
    • http://voteforbothwell.com/uploads/1/3/0/4/130476401/tojirogebes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://revipob.files.wordpress.com/2020/06/84565706970.pdfIn PDF document text
    • https://supofelusipi.files.wordpress.com/2020/06/68266744614.pdfIn PDF document text
    • https://segokowiw.files.wordpress.com/2020/06/rirawepimigedede.pdfIn PDF document text
    • https://worifegu.files.wordpress.com/2020/06/69998572270.pdfIn 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://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: calvinmousavi.com 3 samples

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002121a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2121A 11952 bytes
SHA-256: a65b98a499e5b231a7e49458399984c601f0dcd729488b15826b62ae87722c7b