Malicious PDF — malware analysis report

Static analysis result for SHA-256 095dc41109d10ef5…

MALICIOUS

PDF

38.6 KB Created: 2020-10-30 16:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: ac368c2194c6051fcbe76aab05038b01 SHA-1: dd4b70f4280262415aeb8e162a49096daf309b6a SHA-256: 095dc41109d10ef554ec5a28485452d3bb2304581f7fec99a6a657ee659616ba
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/strik?keyword=generalized+model+for+program+planning In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f884f9c77086.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8709547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5f8f501daf2e9.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/9719974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5f89305ca82de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_5f9034c2b173e.pdfIn PDF document text
    • https://jexixixusa.weebly.com/uploads/1/3/4/3/134336138/kadoputifadejapi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e9a058f2-eccb-4492-8cc4-8c7b0d139783/80872778971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8774/8508/files/concession_stand_food_safety_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/7727/0425/files/najesowifebozulixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45697d0-46ef-4756-a126-f67472174e0f/hall_stuart._a_identidade_cultural.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C10 4972 bytes
SHA-256: 287b032b797ce12fae46919ab0306b5c4ccfb7ce30fb523acfe16f5ee64efd7b
font_01_sfnt_off00005ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE0 10148 bytes
SHA-256: 98496bfffc484deb0097a5bb0466c58bf66431f14170216e0d1ca387c77f671f
font_02_sfnt_off00007fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34