Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ccaa7d5dbda3a3…

MALICIOUS

PDF

36.6 KB Created: 2020-04-13 07:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 27a23dc0a4f95eacd7fd1d51a9267e59 SHA-1: cd24b9eb7c6a52c63cdb777db368e5c8fee9014b SHA-256: d9ccaa7d5dbda3a31a20588873c37348930f12df88646a18fd5b41517708e950
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO spamming operation. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a multitude of external resources, likely for malicious redirection or content distribution.

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://jenroncorp.com/uploads/1/3/0/6/130639901/130639901.html#boss+br-864+manual+pdf
    • http://eqdesignllc.com/uploads/1/3/0/7/130775951/fujifujubipik-popusafado.pdf
    • http://alluringcosmetics.net/uploads/1/3/0/8/130874554/pubilafixif.pdf
    • http://fedrika.com/uploads/1/3/0/5/130551006/zipurutakej.pdf
    • http://top100christianartists.com/uploads/1/3/0/5/130551339/8cb76f8c8.pdf
    • http://compassionflower.com/uploads/1/3/0/8/130814226/zijal-fezabugapus-jawutujinodam-fezelijobisel.pdf
    • http://summerztreasures.com/uploads/1/3/0/2/130273748/jerurubavu-pomepilaledi-faxogogisujedad.pdf
    • http://allthingslex.studio/uploads/1/3/0/5/130551013/gowaboz.pdf
    • http://carnordds.com/uploads/1/3/0/7/130775049/dugireg.pdf
    • http://mythoughtpartner.com/uploads/1/3/0/4/130436415/9736691a41157bf.pdf
    • http://cornerstonemedicalbilling.net/uploads/1/3/0/7/130740090/9588873.pdf
    • http://wellselevated.com/uploads/1/3/0/5/130588169/5640413.pdf
    • http://shannonkmccurdy.com/uploads/1/3/0/6/130639481/9469647.pdf
    • http://karenderrickdavis.com/uploads/1/3/0/8/130814174/xuzijukeze.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c76.bin
64e8f5260a67195b9aeb23fda0e1641d909518da87ab5754af0eabdbbf887a13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C76 2088 bytes
font_01_sfnt_off000065e7.bin
a4144cfc249faaa198ae38c6fa0072f93ed0ac00acc647fece48f31beeb9f4dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E7 7864 bytes

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