Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eaf055bfff96b9e…

MALICIOUS

PDF

42.4 KB Created: 2020-03-15 14:18:32 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 535737f0eea97484d89fa10c46bc71e6 SHA-1: 8569e38c9430ee39680a9360111b20c80c93308e SHA-256: 0eaf055bfff96b9ef80c39d1005ec7d23aef760ab505c122a5ce13bc44a798b0
96 Risk Score

Malware Insights

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

The PDF document presents itself as a 'Computer system validation risk assessment template' but contains a large number of external links, indicating a link farm or SEO spam campaign. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users to numerous other sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest a potential for malicious redirection or further payload delivery.

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://www.paperchaseaccounting.com/uploads/1/3/0/5/130589031/130589031.html#computer+system+validation+risk+assessment+template
    • http://aassefa.com/uploads/1/3/0/6/130621033/16f4d5496b7.pdf
    • http://www.anniemesaceramica.com/uploads/1/3/0/6/130604724/gejupex-kixebos-mijutupibej-kimelugab.pdf
    • http://radioholland.co.za/uploads/1/3/0/6/130620861/9228870.pdf
    • http://gointexan.com/uploads/1/3/0/3/130324270/bf9a4fe83a4e1a.pdf
    • http://feeds.walteradamson.com/uploads/1/3/0/3/130313410/napexetaxo.pdf
    • http://365biztransform.com/uploads/1/3/0/6/130604488/87ecec28400863.pdf
    • http://dentalhomegeorgia.com/uploads/1/3/0/8/130874010/7996212.pdf
    • http://lambaborgdesigns.com/uploads/1/3/0/6/130621502/jigaj.pdf
    • http://annieguidelines.com/uploads/1/3/0/4/130488850/216cfd4651.pdf
    • http://www.bonnievig.com/uploads/1/3/0/7/130775904/kuwejapirunofamu.pdf
    • http://evolvethriverelate.com/uploads/1/3/0/6/130639632/domovagali_woforokezi_dobuzuduwuj_xinogifufatex.pdf
    • http://air-bag.no/uploads/1/3/0/9/130969115/59de03a8.pdf
    • http://fitfritz.com/uploads/1/3/0/2/130287500/3334461.pdf
    • http://ryetarded.com/uploads/1/3/0/3/130379294/8b92f7a4e16.pdf
    • http://harmonybaptistchurch.com.au/uploads/1/3/0/4/130483561/3275444.pdf
    • http://www.introducingashley.com/uploads/1/3/0/8/130814208/6e4720c48814.pdf
    • http://bsa-sccc-pack301.com/uploads/1/3/0/3/130323339/newopoginon.pdf
    • http://millennialrealtysolutions.com/uploads/1/3/0/2/130272513/mifigadunidoti.pdf
    • http://callkevin.net/uploads/1/3/0/7/130776023/pironipedaregemezuf.pdf
    • http://acdclothing2014.com/uploads/1/3/0/7/130775928/9318869.pdf
    • http://a-listcbd.com/uploads/1/3/0/3/130312991/wovefubirobopon.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_off00007bd9.bin
66e54775774f4ab269fb11d0ba0a45d2ef98ba11ef38e64f343b5c26359c0da2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD9 8168 bytes