Malicious PDF — malware analysis report

Static analysis result for SHA-256 047e6829b82ff831…

MALICIOUS

PDF

45.3 KB Created: 2020-10-12 19:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a07b063f2d340db2b66a823cf10c2199 SHA-1: 24743730669d9d8a3acba863313cb9d1ebc42f33 SHA-256: 047e6829b82ff83153d398554849da2f2341dc7b4611d54f442b2dcd47ca3309
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://gettraff.ru/strik?keyword=chapeuzinho+amarelo+chico+buarque+pdf In PDF document text
    • http://files.lauraguayartclass.com/uploads/1/3/1/3/131380005/memukegenof_gurowuganatuso_mubufe_wejetinosuwesa.pdfIn PDF document text
    • http://files.shopcafeparis.com/uploads/1/3/1/3/131383943/lazid_fuwenifuzojure_wadutagoxekerur.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/7d4a7081-3c43-460e-846d-8c53e9c3cc99/4057578911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61b12571-9221-435a-bc78-fe44f1fa9667/81860784618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17edd027-31fb-4540-8170-0869add56dff/50565847133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69ca1008-74b3-4ed5-b3e4-5bcbaa257a18/pafalusuromot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b8305d-a5b2-4c1c-95d1-51fdb18afd11/pugopopidaxufujosubukaled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1608/9510/files/jamigofofemijolala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8337/8069/files/1950s_sock_hop_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fadb3990-6e20-4c50-9d67-e4296b53c502/91809650721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efcb1acd-e5cb-422d-a44b-221ac9662971/sasegejanuwovefuwovokatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e409bd-db41-4901-8aa8-41925a757aa0/33632402253.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_off00006ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC7 5436 bytes
SHA-256: f1bafb25aa97cecb662b4aa1395eafc4f7f495eb92deacfb47aa20015a9ec275
font_01_sfnt_off00008110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8110 12908 bytes
SHA-256: 13fc43aec294b68fd87e4d630eed20db523d606e0028fb9273cbf1108eb9ace2

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