Malicious PDF — malware analysis report

Static analysis result for SHA-256 401f947dae03d5ee…

MALICIOUS

PDF

72.5 KB Created: 2021-02-22 15:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f1a73e7b5ba0ede7832928713391d18a SHA-1: f365c686fa8890b68681cc1d9f88dbd9bd1e2531 SHA-256: 401f947dae03d5eeae560d3d096f64c17b2bc47c6c2121707513e96743dc13c3
254 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
  • 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://yafferge.ru/wix?keyword=amen+amen+amen+song+lyrics In PDF document text
    • https://wutiduxa.weebly.com/uploads/1/3/5/3/135300785/vofefa.pdfIn PDF document text
    • https://cdn.sqhk.co/vatopibar/cjj3Lgh/samufija.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/jiDyjv0/68873404930.pdfIn PDF document text
    • https://tajujarosoko.weebly.com/uploads/1/3/4/7/134749081/961813.pdfIn PDF document text
    • https://cdn.sqhk.co/salefudodid/jhhggjv/27906216214.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/wipunesux.pdfIn PDF document text
    • https://devojakosumu.weebly.com/uploads/1/3/5/3/135314674/2341f282.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/xupizewuxere/bisovokusatifi.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/caslon_black_ef_font_free.pdfIn PDF document text
    • http://luwegovufa.epizy.com/cross_multiply_to_find_x_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/arma_3_steam_size.pdfIn PDF document text
    • http://famirafopuremu.rf.gd/16371546037.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/82166892478.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/ccsf_computer_networking_and_information_technology.pdfIn PDF document text
    • http://lidagubokog.epizy.com/customized_chocolate_bar_wrappers_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/34241550727.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_off0000df7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7A 5212 bytes
SHA-256: e03b68a46966b64761b4fab09f20181a3c50f6da424b096af4367c1772124912
font_01_sfnt_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 10428 bytes
SHA-256: 29966934a1f4cf0434d9cbe0d5e59ffc96de341265ca0ff68b4453f1d630016d

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