Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe6858bed525da8…

MALICIOUS

PDF

41.5 KB Created: 2020-10-10 09:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d10b89459f28f60aa78e2d64635f98c7 SHA-1: eeac5a65f9852277c90559bf306e8b69cf147dae SHA-256: efe6858bed525da8c733a3946fdb812d68bf413da1066b50923a65514735bf13
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://ggtraff.ru/strik?keyword=john+taylor+gatto+against+school+pdf In PDF document text
    • http://pobovop.codymcdonell.info/uploads/1/3/1/1/131164250/vesadurudimevax.pdfIn PDF document text
    • http://files.ainslierobertsprints.com/uploads/1/3/2/7/132710779/50a79fbb05a941c.pdfIn PDF document text
    • http://jufoxuj.nancymorse.com/uploads/1/3/1/3/131379121/xilaxibivelonaz-xorati-funak-dewivopatenu.pdfIn PDF document text
    • http://rifed.holisticfamilycare.com/uploads/1/3/0/7/130739906/xaleni_gowaf_rigapakukal.pdfIn PDF document text
    • http://files.walshems.com/uploads/1/3/1/4/131411539/239caee0f17e1.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/84758823-883c-4f9b-b053-a125faab12a6/wufumipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f088c889-896f-4676-bacf-8196eedb2693/71014864229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e8f7c1-29db-4127-9816-7913c61d8ca9/vurodomawibamesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bae62f8-8b80-41b7-ba4f-a6b7b1de79c5/50967534639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a83d78c-bbcd-4c5b-9ad0-e6a48196eeda/gowofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ebdee9-4569-4495-a724-7bf311f5b955/98185961113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50b99e3c-a4a8-4e1d-b15c-09ff5dadeb04/14322385439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2742203f-ae32-4a21-9af0-588489b8e143/58971644897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e287f9cf-3058-48de-887b-11a75861740c/54892732221.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_off0000642a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642A 5508 bytes
SHA-256: fc6db89fe127d22ae56a4eb9d21e447561feab243ce9441a9a4c92d4b692fc4d
font_01_sfnt_off000076ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76ED 10088 bytes
SHA-256: 0e799e173535aae765f7f2d0bc651b96317ed769554b7e37bfec1f12f2faa388

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