Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd63b630623cd789…

MALICIOUS

PDF

44.9 KB Created: 2020-11-08 20:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 4db0ee8c2cf04f9bfba1f2649f46dcba SHA-1: 309a8be9a0f95b10bdbaf2bb047532c3272915a3 SHA-256: dd63b630623cd789edc2b09cbf38adcc9e6ce599e74cf24d94df847d7333d34a
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://traffmen.ru/aws?keyword=flick+launcher+pro+apk In PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/kigolisekeminonoro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421208/normal_5f985318a797d.pdfIn PDF document text
    • https://daxedinojadu.weebly.com/uploads/1/3/4/5/134590150/8075774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f891a8361bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5f8ed47011bd7.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/kawabijajel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5f90a30710cf3.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/4ab74ea3-243f-4747-8b7f-0d58026bb3b7/buwifenemulamil.pdfIn PDF document text
    • https://datakedo.files.wordpress.com/2020/11/daremobun.pdfIn PDF document text
    • https://binapufa.files.wordpress.com/2020/11/download_treybal_mass_transfer_operations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc10fdac-0b02-4075-bd1b-20a6ccc446cc/texazipoba.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_off00006224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6224 4664 bytes
SHA-256: 5720efcc8369fd7f5c3e03dd9cac2defa9e0f7c63dd1a4bfc0c216c4792a0052
font_01_sfnt_off000071dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 10864 bytes
SHA-256: c78d7cc15c00c126e54c6a30af4149bfc2d1ce042ba9e43f335a97230b626a26
font_02_sfnt_off0000971a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x971A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3