Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dae87e5cea5cd93…

MALICIOUS

PDF

36.5 KB Created: 2020-10-26 01:15:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5126a47c822bfcda715f980813730877 SHA-1: 06804baf5de295e7df75b4999fe0b96a71962368 SHA-256: 8dae87e5cea5cd93dcc3107ed92aabc2088418bcac0bd9579a97b64cfd2a44c5
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.me/123?keyword=georgia+medicaid+fee+schedule+2020+pdf In PDF document text
    • https://wezawitulenif.weebly.com/uploads/1/3/4/3/134338426/pejikurep_beduran_gizuvama_jowefomukabov.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/boduwu_newuluzorejidop_zupezodaxudo.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/53bfa.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/joxof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385634/normal_5f8d4a0f26d9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f95fca68aa7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f87028f4a7b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383802/normal_5f8da912c530f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_5f8bbb6c1b511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f88482dc451a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f89773e21a61.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/jamokaroxoj/22456278914.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/botany_books_for_bsc_first_year.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/japisanujuvatatum.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/65898133537.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/xanaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b547fd0-40f2-4a06-8fcd-cb4b5e61f7d6/sagogegapedukadowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed957b1-2b93-4499-9f14-59c0f721e3bf/ingenieria_de_manufactura.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/foruzefosekawipibak.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/1930485959.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/51930078457.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/56420616343.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/definisi_liberalisme.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_off0000505b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x505B 5872 bytes
SHA-256: 35d265a28954d2c70226224eb6dbb0b25425489f7455b92b9047bf03eee2e88f
font_01_sfnt_off0000643c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643C 8848 bytes
SHA-256: 8a70e97b756533a32f3c2be3ed39828a2d36666d0072eaac4d389021d306267d

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