Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31971062b535e98…

MALICIOUS

PDF

45.3 KB Created: 2020-11-08 15:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d8a352b8b5a274d2ccbf4a2809a1e262 SHA-1: 8e072b5753c5d2c0d6bad19bcc9c1df8f183a225 SHA-256: d31971062b535e98a151ed54c2ed3a0706d42a55c9b75e59b245439356859bc4
124 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=words+with+scrib In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f8f3761984a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_5f8d7dc263fea.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/gunuraxed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385620/normal_5fa426ed271aa.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/e8cde3a4-aba9-42df-ac95-a8c79d3ab45e/vizewu.pdfIn PDF document text
    • https://jasowumir.files.wordpress.com/2020/11/99879968530.pdfIn PDF document text
    • https://rukotufunado.files.wordpress.com/2020/11/35275892063.pdfIn PDF document text
    • https://redegikabave.files.wordpress.com/2020/11/29838373040.pdfIn PDF document text
    • https://jivibizi.files.wordpress.com/2020/11/17574240788.pdfIn PDF document text
    • https://biloduwez.files.wordpress.com/2020/11/rsd_max_the_natural.pdfIn PDF document text
    • https://sirilab.files.wordpress.com/2020/11/pukoloxutudikadijogo.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_off00006726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6726 4592 bytes
SHA-256: ae7fe9086d11ccb6cd7db4c8d4ec3fca68d68388a1cec28f815b5924f13dfec8
font_01_sfnt_off000076eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76EB 10392 bytes
SHA-256: c5ba8642a96a3cc01dc3ca6a2a614da0cd3da837ef50ced3ab26b8458488294a
font_02_sfnt_off00009a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A89 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e