Malicious PDF — malware analysis report

Static analysis result for SHA-256 b677fedee2c27a0b…

MALICIOUS

PDF

70.0 KB Created: 2021-02-21 09:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7fa8a11cc8a2cf570c3abdba41bfb050 SHA-1: c251258ba8749746fe6a57fed90ced0c96db9263 SHA-256: b677fedee2c27a0b34022a60109d52432c8ac8e3b2b4e4b0737f83e5261ac346
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://jacksth.ru/123?utm_term=how+to+start+a+johnson+outboard+motor+without+a+key PDF link annotation
    • https://wemadaxofopu.weebly.com/uploads/1/3/4/7/134752229/8197786.pdfIn PDF document text
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/1afcc.pdfIn PDF document text
    • https://rabivavas.weebly.com/uploads/1/3/0/9/130969809/torepurone.pdfIn PDF document text
    • https://barefofu.weebly.com/uploads/1/3/4/4/134492989/6036817.pdfIn PDF document text
    • https://kixumiziri.weebly.com/uploads/1/3/2/6/132681985/556db47b91f.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/jevifubufawenagovize.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/6363211.pdfIn PDF document text
    • https://zajebujop.weebly.com/uploads/1/3/4/9/134902249/bufufekagepob.pdfIn PDF document text
    • https://guvikaki.weebly.com/uploads/1/3/4/5/134519546/689770a.pdfIn PDF document text
    • https://jaxevilin.weebly.com/uploads/1/3/1/6/131606955/vofuvasiz.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/xapijifas/55075368805.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/calorie_counter_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/molakusasapo.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/irrigation_system_design_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/mufuwatos.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_off0000d865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD865 5468 bytes
SHA-256: 9ad3cbe099e6a6949527e1b1f5393896f676e25bcb14ba64f4d5ab2e7114b806
font_01_sfnt_off0000eae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE2 9364 bytes
SHA-256: c99bf8ca453cdc7d1076a16b1aa66d849d14468eedd0bd21db2d6661da440662