Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e695107fc3c8b2…

MALICIOUS

PDF

32.3 KB Created: 2020-05-13 02:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6bd5fdb2e37ed202e2ec3c67bef4b5bf SHA-1: ff0349c36df3fcbd317a6844d4788e0bac79190c SHA-256: 09e695107fc3c8b264b381a53455eadbff89487b3bc8f5ceb48b9aa2ed88964e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of numerous external links. No scripts were extracted, but the sheer volume of outbound links points to a non-standard document purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://4angelstshirts.com/uploads/1/3/0/3/130380037/130380037.html#comparing+fractions+same+denominator+worksheet+pdf
    • http://bullyupstander.org/uploads/1/3/1/0/131070377/4501640.pdf
    • http://magpiejewelrygallery.com/uploads/1/3/0/5/130543168/6635246.pdf
    • http://hipsterestate.com/uploads/1/3/1/4/131437313/3873330.pdf
    • http://scholarsofservice.org/uploads/1/3/0/7/130740616/ecab35e247a28f1.pdf
    • http://renovationparis.fr/uploads/1/3/1/3/131384333/gamaxa-lefofedajif-sopago.pdf
    • http://aquamanagementsystems.com/uploads/1/3/1/4/131454222/8688872.pdf
    • http://peacefulpacaplantation.com/uploads/1/3/0/6/130639762/ff6bfce897f8f04.pdf
    • http://crystalgardens.co/uploads/1/3/1/3/131383592/bulupo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off00004e65.bin
b40910133c76111f8ae5f27b38a971e7f55bbbe71e7c14cba5664b503d8d8e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E65 11400 bytes

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