Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8feeca31ef3461…

MALICIOUS

PDF

37.7 KB Created: 2020-06-10 12:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07c2f801c192b27fbfa72fcb75f4369c SHA-1: ea8be17f51c148be56f583a4ad2450e08bb1ce6b SHA-256: 9f8feeca31ef3461d0656186a00c61b3e2a08da4f66c63965b8d72c6fe294346
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing:Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body contains text that appears to be metadata and a URL, suggesting a lure to external content. The primary attack pattern involves directing users to a link farm, likely for SEO poisoning or to host further malicious payloads.

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://host243.carmichaelnl.com/uploads/1/3/1/3/131398143/131398143.html#bar%25C3%25B3n+de+b%25C3%25BAho+%25C3%25ADndice+de+cambiar
    • http://theelectronicsdepotinc.com/uploads/1/3/0/9/130969266/6def02b82b40.pdf
    • http://misssupremepurityqueen.com/uploads/1/3/0/7/130739553/kajikexafi-zadawon-rodunesoxezipo.pdf
    • http://successcityhome.com/uploads/1/3/1/8/131856150/8621547.pdf
    • http://red-batterybeauty.com/uploads/1/3/0/7/130775199/3983516.pdf
    • http://myfureverfrenchie.com/uploads/1/3/0/5/130541271/d064bf0.pdf
    • https://nizekifu.files.wordpress.com/2020/06/40312465568.pdf
    • https://pedonatip.files.wordpress.com/2020/06/mixulevijaberufaturelud.pdf
    • https://duvisigu.files.wordpress.com/2020/06/pilumobu.pdf
    • https://fewabomomafe.files.wordpress.com/2020/06/putovunebasijo.pdf
    • https://towawak.files.wordpress.com/2020/06/52220359572.pdf
    • https://jakasizox.files.wordpress.com/2020/06/66029494542.pdf
    • https://zejawoxo.files.wordpress.com/2020/06/52224186227.pdf
    • https://zifumopof.files.wordpress.com/2020/06/11968428839.pdf
    • https://bebeleg.files.wordpress.com/2020/06/zebubobegifoze.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_off000062a7.bin
1956a71c6207d30cbcd3ce53caa58694b96c015a50b8de2bd43aee08f67cd04a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A7 11812 bytes

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