Malicious PDF — malware analysis report

Static analysis result for SHA-256 532f38f875b4ad36…

MALICIOUS

PDF

37.2 KB Created: 2020-11-08 22:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 88f9410511447b168fbbff7c47ba4040 SHA-1: 0f63b662d3d4a052d7cd5308a12fb05a3910265c SHA-256: 532f38f875b4ad36bf6a5feae4286c1c3b0d09a316a18a766eaf49458a80025b
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=harrison+nj+public+schools+employment In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5f920ec58c869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5f91cced29348.pdfIn PDF document text
    • https://jigupipugefelo.weebly.com/uploads/1/3/4/3/134387822/811882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f87247a2470a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375887/normal_5f9fa849cb623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f87596fea60e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f95d2e6091d2.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/bepukuba/32398690073.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/banifuxu.pdfIn PDF document text
    • https://durupar.files.wordpress.com/2020/11/vermintide_2_launch_error.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/895473ae-1064-4f57-ad9d-428d1a9d6c77/3133010325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93991c73-cdc7-48fb-a9c9-33a1f33dab1a/nudaxelutexadevaxemoke.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_off00005191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5191 5452 bytes
SHA-256: e5c3b23147b6cbd6f920569689d5b4369586ae2caba07c14996f3a785051b786
font_01_sfnt_off000063f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 10736 bytes
SHA-256: 867d65996ef42e993a8cada359d2291546d935be207b2e9975e661fe168f1673