Malicious PDF — malware analysis report

Static analysis result for SHA-256 23032f389fd1ee4c…

MALICIOUS

PDF

43.0 KB Created: 2020-11-08 20:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 9d09d9affb8781f05a59b01289c5ee69 SHA-1: ac68a786c9a152032b5e2484ef7ebcd08ec1993c SHA-256: 23032f389fd1ee4c09c84e95d4dac9708f4b77f7a6a179a553f3ad71c71138a8
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/aws?keyword=skydiver+information+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5fa463df3e3a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_5fa0ec5e7e834.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/list_of_architects_in_chennai_with_contact_details.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8b3e1b-f3d7-472f-b10c-bd47e6cd72ad/quavo_huncho_album_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/703dbd85-5d32-480f-8aac-b0e399ca31f5/22147417773.pdfIn PDF document text
    • https://pojoxiriwofi.files.wordpress.com/2020/11/powanamozabivowotibevuta.pdfIn PDF document text
    • https://motulod.files.wordpress.com/2020/11/63640009167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef9d7fe-bb5f-4260-bf56-2df4779344dd/deltran_battery_tender_junior_owners_manual.pdfIn PDF document text
    • https://ganilumigipe.files.wordpress.com/2020/11/90249138095.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/79802673201.pdfIn PDF document text
    • https://niragadofob.files.wordpress.com/2020/11/91976350662.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/fesasuxugajoxuledozu.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_off000069bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BC 5204 bytes
SHA-256: d899a3de04b04697a103d042e30958556388b6cbc76c3f526298b40cbc9367ca
font_01_sfnt_off00007b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B71 10480 bytes
SHA-256: 96b4c0ab37ef5128981c183440ad78732ed7b275dd24ec7f489e0b623daa3744