Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3f1c865b5113f3…

MALICIOUS

PDF

69.9 KB Created: 2020-12-15 10:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 488050867cb503b2217ddc6a5fa29f3e SHA-1: f8daad2e3f819d3201532442c45807cd34d1d830 SHA-256: ce3f1c865b5113f317cf4d10637bf172c04446a727833543324c48917f7710d0
254 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
  • 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://cctraff.ru/wb?keyword=apologize%20song%20%20musicpleer In PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/tugibob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476567/normal_5fc641a2642b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_5f88eeacad426.pdfIn PDF document text
    • https://xotogulil.weebly.com/uploads/1/3/4/6/134655180/68d88e9ee754.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a896c194-0849-4717-a46b-51119b6cb780/keteniwumonosase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d3ea4b-b5c3-48bc-9cc1-b233358077a8/47446698167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4622e0c-1505-41bb-945b-87fbdceb7ee4/undeniable_madeline_sheehan_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62babfd6-50a5-494d-9b25-b5b148f9c3fc/wavopowiraxexarajiludi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b1b3bb1-e6c3-4ab6-9df9-d3689be8455d/wevixibanowow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0deac0c-0652-4dc8-802b-71038bab6236/72380076642.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/whirlpool_wtw4850bw_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b017c3f1-11a4-49cb-b519-61dc99a70db0/how_to_create_chainmail_armor_in_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e84d34-586c-4467-9f2a-f0cb618a92a5/niwavapokudupekafagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fafcbd5e-a281-4645-b8c8-564c34e35686/what_does_esol_stand_for_in_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11742c93-6e9d-46d3-ae78-34e2cff9df7d/1933622162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/358fdc16-9560-4bfb-8773-dc4ae0fe1a0b/57196454011.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/part_of_the_supreme_hindu_trinity_crossword.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9158731-5bb6-410c-baa3-b9bb59888e71/tesugonizuk.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_off0000d6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AB 5084 bytes
SHA-256: 35d2f7677edb2dec5c4d555e07c752e9b9f96e6c38de1cba5a0eed208194b0c2
font_01_sfnt_off0000e7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F3 10200 bytes
SHA-256: d4ab0175fb6b5904f04858e31e5a89c5b152b8a2d71219c2fcd1485b775488e2

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