Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6976f11906aabf…

MALICIOUS

PDF

66.4 KB Created: 2020-11-17 20:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: cb13b29380dc0af9a54a02a560605113 SHA-1: 5eb594207c9605930f8ba86f134401c29bda5cb8 SHA-256: 2d6976f11906aabf42fd7872cc33b25bb0dca9113c1d23bf06c22341b24d5e15
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to external sites, potentially for phishing or malware distribution, rather than providing legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://traffmen.ru/123?utm_term=first+ascent+mountain+guide+pants In PDF document text
    • https://vulewerogoxo.weebly.com/uploads/1/3/4/5/134507491/ximoluwofowufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_5fac2885ef95e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413017/normal_5f970629d3abc.pdfIn PDF document text
    • https://folanejo.weebly.com/uploads/1/3/0/7/130776558/xirawejuketudu.pdfIn PDF document text
    • https://velulaganivuvoj.weebly.com/uploads/1/3/4/4/134438708/c279913a89a.pdfIn PDF document text
    • https://jedunaxalow.weebly.com/uploads/1/3/1/6/131606453/xokobaj.pdfIn PDF document text
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/14039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f8b0784a6c89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f8c1bd3cdfbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_5f8caf951655a.pdfIn PDF document text
    • https://topemarepebide.weebly.com/uploads/1/3/4/3/134316461/7410343.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/0d110214-a1a5-43ca-8635-624595f25f31/nixemibetuvinixozomuvum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffcd720c-2817-43d7-bcc2-d4728f2b7771/61433574470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad25dd1f-c9d3-41e9-92fb-67358bae5ce3/sims_4_tube_top.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7dac9c7-d394-4a19-992b-ff32be8519c8/jebaz.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_off0000c354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC354 5316 bytes
SHA-256: d7efe6804b746bc4ddb708d4eeee345e586bbab835e5601e60b0ee606de55514
font_01_sfnt_off0000d558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD558 11028 bytes
SHA-256: ecf5e559017a8d3f0db47058ef4ce0b6b932e15d3017f2011014432a73c19024

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