Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2671821487e8f58…

MALICIOUS

PDF

45.4 KB Created: 2020-10-02 08:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5eba9214e70880e5ffbf5306f53d7ad7 SHA-1: 703f775bc746c68270ec0d576e1c090e3d28b03e SHA-256: a2671821487e8f58c6e9d977f2892ad1d79a541bd82bb2661a208703b96fed05
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=the+physics+classroom+momentum In PDF document text
    • http://files.country-charms.com/uploads/1/3/0/7/130739712/4429807.pdfIn PDF document text
    • http://files.mpflynngroup.com/uploads/1/3/1/0/131071243/relugezisimudiwon.pdfIn PDF document text
    • http://files.leannejohnston.com/uploads/1/3/2/6/132681213/pizolevemopavo.pdfIn PDF document text
    • http://files.r2wnt.com/uploads/1/3/1/3/131378771/rosimuva.pdfIn PDF document text
    • http://zitubepi.neilmccarthypoetry.com/uploads/1/3/0/7/130776418/7123214.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/2ae75a13-4ef3-4098-ad04-af9a5e5bac63/zefovozawiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8dadd94-55d7-4d18-8ca8-fc99b0c80646/99838658652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee078910-cffd-4258-88f4-39526605c299/nivagagujafiveleleluwigem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4843a267-abbf-4942-a3ec-1b0247541b25/76129758388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af1cef9-148c-475c-96f7-cb7c643c4397/19031855038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ca8b9f-8456-4cf8-82b8-f93e85a5708d/xagegul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/611b9bd9-4a0f-459c-94a8-83f361542a9e/15634617044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ddbf2c1-9b70-48c0-acfc-313684fec68a/susagumuzonalixesevux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab41ec6-81ba-426e-9afd-f12b6c4d5313/92614158589.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_off00007338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7338 5224 bytes
SHA-256: 0340764108fa642c97dc5f635d763d312c342a11dba7d86b4b9349ea604518ab
font_01_sfnt_off000084dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DD 10612 bytes
SHA-256: d162cd4e0b8162f06eb24f812f1831094aa4e5b47982296c5205de6098c2f47a

Open this report in the interactive analyzer, or submit your own file for analysis.