Malicious PDF — malware analysis report

Static analysis result for SHA-256 be53f2c93fa7859e…

MALICIOUS

PDF

80.1 KB Created: 2020-11-09 19:21:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 07cc5e1b93d1fd389245e869248b831e SHA-1: d5e714191d3d441037fc2dc36b2a42964267a691 SHA-256: be53f2c93fa7859e22b83647822c7c45e1fd196290ba064e046cec79cf7cd441
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure, including the critical URL https://ggtraff.ru/strik. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to furniture sales, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/strik?keyword=apple+house+furniture+++bedding+-+concord In PDF document text
    • https://menerixejujup.weebly.com/uploads/1/3/4/6/134605313/pidomofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5f8a1665d7b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_5f90d69d679d2.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/xewuj.pdfIn PDF document text
    • https://fapadeli.weebly.com/uploads/1/3/4/4/134445247/761870dad8.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/vokepilewobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_5f9f9e1724400.pdfIn PDF document text
    • https://vuxutuwatojo.weebly.com/uploads/1/3/4/6/134625262/9424b8d395b2a44.pdfIn PDF document text
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/rimaxovofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5fa0d660ed667.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/mijiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404976/normal_5fa594fe28eb3.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://s3.amazonaws.com/gezetega/78707056631.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/pelufel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd6d3f6-f111-4025-aabe-8230daf7b4af/32332829548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0ef9ef-225b-4805-ba49-38be7ec66ef5/tour_guide_industry_risks.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_off0000f03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03E 5252 bytes
SHA-256: 803f936e472a7f1ce68e4c8f8acd1f7ed5e696c638fc9eb84f027c1167ae3fdf
font_01_sfnt_off00010214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10214 10088 bytes
SHA-256: 41e918fb594a8be1ad72ecc4875107704d70c3cbe606d89164573f97995383a9
font_02_sfnt_off000124a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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