Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7222724e6e7284c…

MALICIOUS

PDF

77.5 KB Created: 2021-01-30 00:36:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 52e1c43846cc5489747c9e453053efb6 SHA-1: b2ff0dc1b4f80e60e4a8c60bdbb4ab21e3deb333 SHA-256: c7222724e6e7284c94d7b0367b223488590e04c2e084e9d827a68bd34108a120
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The embedded URLs suggest an attempt to direct users to various external sites, likely for SEO manipulation or to serve as a distribution point for further malicious content. No scripts were extracted, but the presence of numerous external links indicates a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://jottigo.ru/123?utm_term=daytona+flea+market PDF link annotation
    • http://iranianvc.com/305149329777cf9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497082/normal_5fe2933b81ac5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379844/normal_6005083370aea.pdfIn PDF document text
    • https://gixatupugibezi.weebly.com/uploads/1/3/5/2/135296842/d59a14f30299.pdfIn PDF document text
    • http://beststudent.space/weriladinasevazabomubaw78tbn.pdfIn PDF document text
    • https://dudafenerow.weebly.com/uploads/1/3/4/9/134900552/3497934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393190/normal_600b8d393f3fa.pdfIn PDF document text
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/0dc84c14001d6.pdfIn PDF document text
    • https://tumozoredupoki.weebly.com/uploads/1/3/0/9/130969837/buwosixeja-bogamej-vajimetax-jibefuberew.pdfIn PDF document text
    • http://cozyplacefor.rest/formative_assessment_in_education_exampleswft6w.pdfIn PDF document text
    • http://offthepdrs.com/83271990725qxi0z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/pabugovusukufe.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/29145000261.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/woxagodegejonuvevuw.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/14595973823.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/zujadamesob.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/wopiji.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/tipos_de_bacterias_segun_su_forma.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/weather_report_live_kolkata.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/badmaash_company_hd_movie_free.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF210 4900 bytes
SHA-256: 4e514700b005a3f993557e9ea782ec02bbfec1d99daf985608d7bdcf98b824f1
font_01_sfnt_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 11172 bytes
SHA-256: a116637ac04eaac4193c917927d5522b11758f30f578bb2951fd12720795889b