Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a583cc2030f5a40…

MALICIOUS

PDF

33.2 KB Created: 2020-04-03 11:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5da2bc32dc769f1743394e5ecb33bfab SHA-1: 1f2b0d109b90335b165abce21729f967e357286c SHA-256: 2a583cc2030f5a40495d33c7da9682a2f49ff79d5320eca48334f1d499f4eaa4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 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 document body text and one of the extracted URLs suggest a lure related to downloading an HTML editor. The primary attack pattern involves redirecting users to these external sites, which are likely part of a link farm or hosting further malicious content.

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://bigdsuperfoods.com/uploads/1/3/0/5/130550972/130550972.html#coffee+cup+html+editor+free+download+for+mac PDF link annotation
    • http://confidence-camp.com/uploads/1/3/1/4/131437670/226601a83b.pdfIn PDF document text
    • http://chartreuseonline.com/uploads/1/3/0/6/130603710/982c3c2db7.pdfIn PDF document text
    • http://kayceeanseth.com/uploads/1/3/0/9/130969243/1902996.pdfIn PDF document text
    • http://treetopreptile.com/uploads/1/3/0/5/130589240/vatubise.pdfIn PDF document text
    • http://art2artexhibitions.com/uploads/1/3/1/4/131407625/746d35d.pdfIn PDF document text
    • http://taeil.town/uploads/1/3/0/7/130776394/fotuwazofozivas.pdfIn PDF document text
    • http://issamdima.com/uploads/1/3/0/2/130272361/mavifeg_gegurikudanofi_zudomo_suvulepud.pdfIn PDF document text
    • http://aaconsultingservices.org/uploads/1/3/0/9/130969728/dibuwovu.pdfIn PDF document text
    • http://unitedislamiccenter.net/uploads/1/3/0/6/130640052/josilojoramu.pdfIn PDF document text
    • http://lag-architecture.studio/uploads/1/3/0/8/130813586/7592472.pdfIn PDF document text
    • http://privetst.com/uploads/1/3/0/9/130969153/sasowe_kemizofukikan_mejuzisini.pdfIn PDF document text
    • http://sarsmangroupllc.org/uploads/1/3/0/7/130775658/nesev-degonanos.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000595f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x595F 7808 bytes
SHA-256: c0c944ae9f03b2c126ebb669cb28be7f4519c6a2882ffa78da462e6954d2a5e6