Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a064d76dddf5623…

MALICIOUS

PDF

72.2 KB Created: 2021-04-03 23:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 818783c791b1cd4007599569d50c0214 SHA-1: 5de21019bd4286592c14500ef7eafda7c5e5aec1 SHA-256: 8a064d76dddf5623bac375f8a8bec823a9ab37008cda0c1fb5d761c0dfc887b5
96 Risk Score

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://vilenefex.ru/123?utm_term=halloween+counting+worksheet+kindergarten PDF link annotation
    • http://fosavaxenu.mypressonline.com/how_do_i_reset_my_xfinity_remote_to_my_tv.pdfIn PDF document text
    • https://pemejugaxopuled.weebly.com/uploads/1/3/4/7/134749032/zibev.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/foguz.pdfIn PDF document text
    • https://pasironukid.weebly.com/uploads/1/3/0/8/130814081/sojegevegakogof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pogelejulogowev.rf.gd/xagemetusi.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/facetime_alternative_for_android_and_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/border_design_vector_cdr_free.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/why_is_my_maytag_dishwasher_not_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/how_to_heal_your_body_after_covid_19.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/ladopekemebimejifoguzuker.pdfIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_03d72be755ec44bca3b5bc0dc24d9f10.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/67201954424.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/what_boots_do_the_army_issue.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/lista_pares_biomagnetismo.pdfIn PDF document text
    • http://tomunipi.rf.gd/juzavabatokogefunogozuri.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/alabama_dhr_mandated_reporter_training.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_7cc6db760e254c6eac00d606ea590666.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/guvovigo/zelejewurivatebiwufu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6E 5320 bytes
SHA-256: 3985a5537068157dd2290c3c0f4cac48f4dbc49488c148054b348f6aeaf8fe19
font_01_sfnt_off0000ee8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 10804 bytes
SHA-256: f365a69a17430394970a42cd42192d9f4cac7972dcda27b0af09c24f662aa51a

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