Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ad7bee6ccebc1d…

MALICIOUS

PDF

83.4 KB Created: 2021-03-15 07:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 367ceaa767961a41a35fa2d3557d34dd SHA-1: 40eb52271216ac53edd88c9eb7c28cd07cd67bbb SHA-256: 17ad7bee6ccebc1d78a96f5dc1729cc6996cd0e9ea801f5d00f818b9a3e3f6b7
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/wix?keyword=henry+james+realismo PDF link annotation
    • https://cdn.sqhk.co/nukunudakiju/JXYjfTX/black_christmas_songs_for_church.pdfIn PDF document text
    • https://cdn.sqhk.co/jasorevujoxu/jcGhbgh/xesokujifenotisekuguz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5fd1c983ca6a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392237/normal_60022538deac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448126/normal_6010fc9f43df7.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/MhbnHGj/14545066257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_603f49b54bd93.pdfIn PDF document text
    • https://cdn.sqhk.co/revikokelobu/nuWJ4eh/xidigedavarin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470405/normal_5fe99f2596dfe.pdfIn PDF document text
    • https://cdn.sqhk.co/satofapo/cicjeha/u_dictionary_app_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454289/normal_604b610aa050c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485153/normal_5fdfaf28ec3ae.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/rizezobabub/tangled_2012_full_movie.pdfIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_a9f50e369783401b9ff30289ad407851.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/52412509764.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/irs_barter_form.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/bangladesh_newspaper_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/vumugiximavejiga.pdfIn PDF document text
    • https://7d7e9a41-1eea-4c72-a0b8-c0e3d642de37.filesusr.com/ugd/513cfa_ce5dca4502a943f2980d2366114e2b29.pdf?index=trueIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_2ef6bd3e327f43a0a7042cc6d21546b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/guarantee_ing_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/kakamega_county_map.pdfIn PDF document text
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_94c3a2521f34466d984d74c00020ad46.pdf?index=trueIn 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_off00010722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10722 4968 bytes
SHA-256: 2e60c5a219237a54f7ca133900aa97ab1644bbadfdfe8b9f33466a7a8eac8a44
font_01_sfnt_off000117f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F7 12992 bytes
SHA-256: ce94b1660606ca9d8d93e632b8c0753f815696ad9516e4a9faa4a97ea3802c1a

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