Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79c01b5ef2fbecd…

MALICIOUS

PDF

45.2 KB Created: 2020-10-31 16:38:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 1250120ea95d0a863cb014f85bf3041c SHA-1: 1f8a92d6c3145c85dd0e654bae3aa2f0b77ff340 SHA-256: c79c01b5ef2fbecdf30ca23abb630abd3b98b5d4a4e78b06a88c68835e6d48f3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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/aws?keyword=harry+potter+chess+set+universal+studios In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384029/normal_5f9827689ef58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_5f8fabf541f06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421476/normal_5f986b48c6ead.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/4264753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388428/normal_5f9351f92eb67.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000071b4.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000071b4.bin)
    • https://uploads.strikinglycdn.com/files/6154af4f-95e7-4d4b-be59-9b3e04dfdea9/gunefitarepogasusujubufu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/curriculum_vitae_formato_para_llenar.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/gunuxiparodabobukuviwere.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/85982367228.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/matilde_carola_martinez_arroyo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a2dadf-ef92-48d0-bcdb-50809aefc552/lewogali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0608421e-5479-43d7-856b-1af00af8f096/woluxikipefuzeduluzodaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce4a8cb-906b-45a2-8870-cf7d70ffe8c0/92623319409.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/96806272266.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 extracted file (font_00_sfnt_off000071b4.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B4 5284 bytes
SHA-256: e3decaf8b481943b1d0a2827b1b0391b459f87a268c1177719508b7ab642a67d
font_01_sfnt_off000083af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AF 10816 bytes
SHA-256: 54c5d1ef72441e10af6e0d4fa3ff8069beafbdb1499788d2e3db3251d0b40b44