Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2cd765f4b2f8af9…

MALICIOUS

PDF

71.1 KB Created: 2021-02-08 10:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 934ee0325f052b535219ebc44a68d1ef SHA-1: cd8d583273d3376aaec42f1a00c75310842b2b54 SHA-256: e2cd765f4b2f8af9f20f7fe5cc305e07cf55f13c168158b0be1c5e8b795aa050
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://crophysi.ru/wb?keyword=name%20a%20star%20certificate%20templates%20free In PDF document text
    • https://cdn.sqhk.co/roretuduva/rgdjcij/xetigixutinujidi.pdfIn PDF document text
    • https://cdn.sqhk.co/xiteduva/XghVpMb/48015223842.pdfIn PDF document text
    • http://mon-cmbretagne.com/nokazujoxosiparurijaguz2izrn.pdfIn PDF document text
    • http://unityfree.xyz/silent_bitcoin_minerftukc.pdfIn PDF document text
    • http://purigoguwoz.22web.org/58200846794.pdfIn PDF document text
    • https://cdn.sqhk.co/kalijada/ggjhHjj/mini_basketball_court_model.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/mejigavukolu/hamburger_menu_android_10.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/simple_business_plan_format_doc.pdfIn PDF document text
    • http://nafakosoleg.epizy.com/catholic_cardinal_virtues_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/it_s_too_late_to_apologize_song.pdfIn PDF document text
    • http://jizabimumonox.rf.gd/reported_speech_positive_sentences_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/18011089754.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/32592052295.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/game_bubble_2018.pdfIn PDF document text
    • http://xepipigedizovo.rf.gd/donoxefidazenufi.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_off0000dc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6C 5132 bytes
SHA-256: d83d91a46b7fe492cccc3ae84e9e8b4734d07eb28564974259b506a444878041
font_01_sfnt_off0000edd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD3 9828 bytes
SHA-256: 25f440da20b8d69591d557e3d4a61b71ef29720d1443b7986c5791a6edac9934