Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8dc542d020a10b…

MALICIOUS

PDF

73.6 KB Created: 2021-01-26 05:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 574e3f613db5fe0b05fd79bf46f4bbd2 SHA-1: 7bdcd591cfb4b64af6533a99242c29f7cea6634f SHA-256: ce8dc542d020a10b409c641e3ace9b9135129ae0d42d6a03aef316c3bf85a0ad
196 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
  • 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://leonvi.ru/wb?keyword=will%20cruise%20ships%20sail%20in%20november%202020 PDF link annotation
    • https://pusiruse.weebly.com/uploads/1/3/4/7/134717846/webibilexunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410443/normal_5fe799de2cbf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403531/normal_5fc763d013466.pdfIn PDF document text
    • https://lozibojugor.weebly.com/uploads/1/3/1/0/131069840/tujemazer-bafofobewatonev-weguruliwila-gexunufunasebet.pdfIn PDF document text
    • https://guretaximijogu.weebly.com/uploads/1/3/0/7/130739376/vaxamemusus-pugida.pdfIn PDF document text
    • https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/putudifizowe.pdfIn PDF document text
    • https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/gatasebale_guluwikixuwokav_todoxudaf_baxokevuni.pdfIn PDF document text
    • https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/ruxapogodutokowudafu.pdfIn PDF document text
    • https://jiranunurojowoz.weebly.com/uploads/1/3/1/8/131860868/kagewoxewen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463002/normal_5ff2054bb7b68.pdfIn PDF document text
    • https://mipoxijal.weebly.com/uploads/1/3/4/7/134709746/bixufufi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391907/normal_5fe3a0da76414.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489041/normal_60027b1822d5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najefitisefema.epizy.com/377390510.pdfIn PDF document text
    • http://mujopoweter.rf.gd/contributory_factors_to_reported_road_accidents_2017.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_off0000e110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE110 5660 bytes
SHA-256: 2230b439ac8d6f81acfd1ff6e4450fc92e07986cfe1a974c05f4520a72286f33
font_01_sfnt_off0000f42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42E 11140 bytes
SHA-256: 8087c0e559e5aae8baa582a6733a382247854e3e96e76eee25f659356a7132b7

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