Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d3569248cdecb0…

MALICIOUS

PDF

77.7 KB Created: 2021-01-28 17:03:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2163817e6c530fa668f5934eb30feb29 SHA-1: bde43c2f901139b02763509d5830f54f18e59365 SHA-256: e2d3569248cdecb031f60045bda70551724a9531999980a228779fa3eeed99ef
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=notepad%20app%20download%20for%20pc%20windows%2010 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4368969/normal_6006fb76587f3.pdfIn PDF document text
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/wuvodilu.pdfIn PDF document text
    • https://kewegiru.weebly.com/uploads/1/3/1/4/131438086/6838115.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389090/normal_5ff1c24a21121.pdfIn PDF document text
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/3350693.pdfIn PDF document text
    • https://doritader.weebly.com/uploads/1/3/4/8/134885844/8043608.pdfIn PDF document text
    • https://rejejowurodesom.weebly.com/uploads/1/3/1/3/131398559/zunasozorowovudezo.pdfIn PDF document text
    • https://puxizabub.weebly.com/uploads/1/3/1/4/131406372/8341943.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/gupawupigawono/psychology_practical_book_in_english.pdfIn PDF document text
    • http://lekipuvuji.epizy.com/66159006336.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/herbalism_wow_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/36182588448.pdfIn PDF document text
    • http://xekuvazam.rf.gd/thermal_insulation_sheet_home_depot.pdfIn PDF document text
    • http://pekudus.rf.gd/60928938212.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/25640968194.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_off0000f2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C2 5404 bytes
SHA-256: 56e2d27e953efd4a75f881ec7e4034e4e7c14bb84e862883a5a77809edd06bfd
font_01_sfnt_off00010550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10550 10760 bytes
SHA-256: a43529675ac577ce1b9dc01c4574ba038f9cc9937b130f4af9e9141f81c08560

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