Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a8efd20df7191d…

MALICIOUS

PDF

73.2 KB Created: 2021-03-02 16:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a1a2a56086490e8d648865e0cfd928eb SHA-1: 914d4feec1defbab387a4aa3430bbda2a7a3c0ae SHA-256: a3a8efd20df7191d388bb305545c6f89be32a90cca3a72c91a997291854ff62e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=american+association+of+diabetes+educators+annual+meeting+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453909/normal_602f8449bb1c1.pdfIn PDF document text
    • http://xulikode.iblogger.org/fimufunezozilekokavepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496597/normal_5fe8312b9fce3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412889/normal_60373cec5855e.pdfIn PDF document text
    • http://psyhologrzn.ru/pagifusukitewebuvsro0.pdfIn PDF document text
    • http://gravkamen.ru/sovexidujakik6j33q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_600c042b595b6.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/hp_elitebook_8570p_not_charging.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464996/normal_603dcfdee56d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494877/normal_5fd1c4cbb5e7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411498/normal_602b68cdbd381.pdfIn PDF document text
    • http://mainsale.pro/2711444955l1hun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jedadokuti/liruzan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD130 5624 bytes
SHA-256: 28454044e7ffe5ac57bebaf10f262c1de7928a97977cc9112195c927571d5242
font_01_sfnt_off0000e427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE427 10872 bytes
SHA-256: 52b52a83b212e65947e0c6df23cfe0c715afc7f95ed36d8a1d372425565fbf12
font_02_sfnt_off0001093e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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