Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0250c296fba8f92…

MALICIOUS

PDF

49.9 KB Created: 2020-10-27 05:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 9845f15049102711b62da5800acf3ba3 SHA-1: ef13c33f7ff9b6e4f67665f1f0b590a9b11e315e SHA-256: c0250c296fba8f922c288d4a21fc3ca500c45ef95dbde43316db5dd79a0b029f
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://cctraff.ru/pify?keyword=skechers+steel+toe+boots+ireland In PDF document text
    • https://lirebuzufosol.weebly.com/uploads/1/3/1/4/131453665/791bf9d83063e8.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/tusumizegado.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/wufenikilegakadejesi.pdfIn PDF document text
    • https://ximinelinax.weebly.com/uploads/1/3/4/3/134313791/buwivot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f8b570ec4db9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421051/normal_5f9796a841c35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414860/normal_5f94fdff0146b.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008600.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008600.bin)
    • https://s3.amazonaws.com/pisedij/descendants_2_full_script.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/questionario_anamnestico.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/sogam.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/15467618474.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/ecological_theory_by_urie_bronfenbrenner.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/nokuxeladizajewose.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/acca_f5_revision_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/lexuworotifakaxobovazag.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/wataxu.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/14270396771.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/weight_lifting_for_distance_runners.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/anxiety_definition_journal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1c1071-64b3-4248-a6dd-9afce40a4a50/62622882594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/417b1957-5837-4efd-a5c9-003a88a70b6d/38573139980.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 extracted file (font_00_sfnt_off00008600.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8600 5332 bytes
SHA-256: 6d7ab683cea3029c1f8d973dfc8b90cd0a251c68feae4c7514962638db6df6b9
font_01_sfnt_off00009805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9805 10028 bytes
SHA-256: a75113c6e290ea3995cf56bc412f683c31e3dd28fb334aa388d92ed63cbe1ff4