Malicious PDF — malware analysis report

Static analysis result for SHA-256 266196561adce129…

MALICIOUS

PDF

74.3 KB Created: 2021-02-27 23:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: af762853d3bf6f58c637f52cde99941e SHA-1: 3b2ae9cd7ee15efce4afcf59cfb7f15965478941 SHA-256: 266196561adce1290b921ac20d977599e0be324cbc0f5c7b3495a121254ec1c7
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=how+to+have+a+good+memory+for+studying PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393908/normal_60092219906aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470975/normal_5fda87667bf5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408460/normal_5fc61e651a4e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368741/normal_6008f1e4c34a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427538/normal_5ffad9a6c41de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367650/normal_5fc97ea2b3421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455377/normal_603960a807311.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451027/normal_5fc8ee01cb10e.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/5866272484.pdfIn PDF document text
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/batipusovereregivo.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/56703022625.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491926/normal_5ffc9e6888d01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://batefagut.epizy.com/appearance_sentence_formation.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/57654085848.pdfIn PDF document text
    • http://futakanawus.onlinewebshop.net/sedimuxobofujazigaj.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/12998493973.pdfIn PDF document text
    • http://juzofomixul.rf.gd/capitalist_development_and_democracy_rueschemeyer.pdfIn PDF document text
    • http://dakawarinuku.epizy.com/antivirus_za_mobitel_android.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_off0000e608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE608 5504 bytes
SHA-256: e6bbece09757754415d9a188d4af7d8c23b23084b24ad7195ab25db6b928b881
font_01_sfnt_off0000f8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B9 10408 bytes
SHA-256: cf1a2f0db5adc224cb1163ae23d8b375bcd4a039723137fd3ee2103704d7159f