Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e4a7f9b79e080b…

MALICIOUS

PDF

37.4 KB Created: 2020-03-20 06:49:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9d5377e84431a801dd8d479550207569 SHA-1: 2d86a06380ebe8980366c4dfdee98ff2afd14a19 SHA-256: 11e4a7f9b79e080b7133ae7eadc9be252cd96d4c4c0a5d6e47a1fd9016354d20
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The embedded URLs and the ML classifier strongly indicate malicious intent, likely to redirect users to potentially harmful content or further stages of an attack. No scripts were extracted, but the PDF structure itself is used to host and distribute links.

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://morgansmehndi.com/uploads/1/3/0/6/130620854/130620854.html#football+passing+drills+for+12+year+olds
    • http://digital-chicago.org/uploads/1/3/0/4/130476309/dekipiwor.pdf
    • http://simpledesignsbyjennifer.com/uploads/1/3/0/5/130588281/1418749.pdf
    • http://kidstipi.com/uploads/1/3/0/2/130289453/4954542.pdf
    • http://peacefilledpathways.com/uploads/1/3/0/7/130738707/jomefo.pdf
    • http://www.1simpledownload.com/uploads/1/3/0/2/130272994/6911846.pdf
    • http://brittonbuttrill.com/uploads/1/3/0/5/130543483/13266589ea9.pdf
    • http://scriptwriterscene.com/uploads/1/3/0/9/130968972/2840960.pdf
    • http://airporthoppermaynooth.com/uploads/1/3/0/7/130738876/werisekoti-xapalefogal-taganu.pdf
    • http://luteacademy.net/uploads/1/3/0/7/130776677/zatiparitujoxata.pdf
    • http://michelledannon.com/uploads/1/3/0/4/130490245/tokuwafuz-ronewerunar-nusix.pdf
    • http://mabanquepro.com/uploads/1/3/0/7/130775759/1588005.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_off00006ad0.bin
680a568eb8b145850506a69e2925c9ff7681410ca3368ba1a76bef33d63e78a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD0 7676 bytes

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