Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de9370c2901ae47…

MALICIOUS

PDF

61.5 KB Created: 2021-02-12 00:51:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ded9241b11dff1fad2e37a02a98a3264 SHA-1: 85f68f5e3fc5f22a90dbd25586d59eefff647f39 SHA-256: 2de9370c2901ae4764e1e416e03f2670e0b3418f5cdb510337d4687ceee719bb
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wix?keyword=dyson+dc56+manual In PDF document text
    • https://delujopasetew.weebly.com/uploads/1/3/4/3/134399242/ab27504908a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451353/normal_5fe892cb0c516.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418362/normal_5ff02b708fd1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412996/normal_5fe74e4d68fd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374520/normal_600b5e49bb045.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/iOZFAjc/lg_health_physicians_family_medicine_lititz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427094/normal_5fecd0aa60a48.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/silubebebefuju/metodos_de_investigacion_en_psicologia_social.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/31934608517.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/cylinder_surface_area_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/59017249300.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/20301587752.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/blending_4_letter_words_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/pasos_perdidos_alejo_carpentier.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/cfa_level_3_book_1.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/sweatshirt_template_front_and_back.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_off0000b565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB565 5368 bytes
SHA-256: 2e4ca29978191350bb181c0bafc341c401809dd4871cec4ded8df107b7e10b04
font_01_sfnt_off0000c7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A8 9924 bytes
SHA-256: f8fea77278dffca84d56005244281f678607571d0425ac73c27879aa1e6cc4fb

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