Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8174977e4acaf9d…

MALICIOUS

PDF

81.4 KB Created: 2021-05-01 11:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cbdbf92e1fa52d7d97ce5c0cd2fae538 SHA-1: e73f78de782dc0e120d75c69e1bc19203407afdb SHA-256: b8174977e4acaf9de6b9631df24604ee75844a4bd51a320c76015032540b736d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://baarspo.ru/strik?utm_term=autoridad+y+sumision+watchman+nee+pdf+gratis PDF link annotation
    • http://gigaxoninijubad.iblogger.org/tipudikirokobalelejosemed.pdfIn PDF document text
    • http://sesiruwasos.22web.org/any_day_of_the_week_sentence.pdfIn PDF document text
    • https://berebexamoleti.weebly.com/uploads/1/3/1/3/131384136/wosomiselusika.pdfIn PDF document text
    • http://lesegot.iblogger.org/videtiwawowipuwifoju.pdfIn PDF document text
    • https://xudinenudomojuv.weebly.com/uploads/1/3/4/3/134356320/658e18a251180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388274/normal_602218c0cdaed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_6037ca7ae8ef3.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/vazisi/43390732265.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/continents_and_oceans_quiz_printable_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/rengar_guide_op._gg.pdfIn PDF document text
    • http://nenoruzu.rf.gd/56075641747.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/nomekakawifexifagavago.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/staying_safe_in_the_kitchen_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/gubudurolo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/pride_and_prejudice_movie_story_in_hindi.pdfIn PDF document text
    • http://kiwivesunita.epizy.com/33254340860.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/jutesid.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_off0000fade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADE 5720 bytes
SHA-256: abdfc3e321db6b017de2e89fba6bbf2f276e865b33527bc1f28034848f0d998a
font_01_sfnt_off00010e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4D 13168 bytes
SHA-256: e6225da9cb474a89ab69b2d53d1979ff21d2a99da87471f4858f4afeaef7db97

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