Malicious PDF — malware analysis report

Static analysis result for SHA-256 05be6f2da0d8249b…

MALICIOUS

PDF

43.9 KB Created: 2020-11-01 17:25:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-19
MD5: 67a2121cdf7f63884f6448504624a514 SHA-1: 6ac446e02dcf2bd6b18ded96897a2bde05761b1e SHA-256: 05be6f2da0d8249b01b4feae9cdabe769cd8c058d51d3a7af7388201c7b7fe4a
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://ttraff.me/123?keyword=do+elephants+migrate+or+hibernate In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5f9bf451277aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f9418672ccd9.pdfIn PDF document text
    • https://gogozugibijom.weebly.com/uploads/1/3/4/3/134369614/9059792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_5f8fcdd02dd4d.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/1925348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382952/normal_5f95c53b8e12d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5f89d93290269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f8974c3ea977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_5f9b1cc4167d8.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/lobal-kukifusovi.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kirorafagosox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_5f9aca863d9dd.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/4e77b8f7-5f6f-4c9e-b413-02b823621d69/negexo.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_off00006cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBB 5372 bytes
SHA-256: adbbf481c11a92f1382d5ba9293239508566b5fcf268ce9ea7714b2d4906677c
font_01_sfnt_off00007ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED1 10512 bytes
SHA-256: ee8beb54c55a7219c91250ce1a7c997689395ec09f5719b3546d04999c4efec3