Malicious PDF — malware analysis report

Static analysis result for SHA-256 4feb18a729aac5c5…

MALICIOUS

PDF

71.1 KB Created: 2021-02-07 08:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d47fe15eb92759d295866d2731bece37 SHA-1: 10c66f6343707730fed87e146175db075ea488bf SHA-256: 4feb18a729aac5c5159039e712050189913a8b12f98c66d991b230ea9718eeeb
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://druttle.ru/123?utm_term=sharpest+tool+in+the+shed+sayings PDF link annotation
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/9433270.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/dikesisuberatoreda.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/5446523.pdfIn PDF document text
    • https://tovijivesigaz.weebly.com/uploads/1/3/5/3/135327805/83a9f4205070da0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408865/normal_5ffd2551915e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503033/normal_6002ca17ad63e.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/hvhahgp/guide_among_us_new_mod_menu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407062/normal_5fc760f2bc402.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387586/normal_600755f924cc5.pdfIn PDF document text
    • http://bewudup.iblogger.org/authorization_letter_format_for_documents.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://varoniwarovez.rf.gd/xipozabanadebarivolelif.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/black_armory_power_level_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/peacock_alley_500_thread_count_sheets.pdfIn PDF document text
    • http://narural.rf.gd/favoledokejewe.pdfIn PDF document text
    • http://jipokogave.epizy.com/jebokowe.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_off0000d96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96B 5424 bytes
SHA-256: f84e340c9190d446a03f48714b329feb47b47107da437711d63e6a6eac5eab3b
font_01_sfnt_off0000ebd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD8 10476 bytes
SHA-256: a881e08c0cdd7a36e4449e03bc77f78b6965d28eab0ef099b890934add73c3b9