Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb8ca59c88626f3…

MALICIOUS

PDF

78.7 KB Created: 2021-04-07 09:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 309c42bd560ab9b2c5a726001d4bb5e6 SHA-1: f90e5766d5ca2d76b583d541ce5933c595dcb0a4 SHA-256: 6eb8ca59c88626f3b67aee21fba2b26b9ebfcd61556e059a482d197c4411f4bd
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or redirecting users to malicious content. No scripts were extracted, but the structure suggests an attempt to manipulate search engine results or direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://soxebez.ru/strik?utm_term=best+price+for+shoei+neotec+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406166/normal_6066eeeb45608.pdfIn PDF document text
    • http://bajemafo.iblogger.org/health_o_meter_scale_walmart.pdfIn PDF document text
    • https://gafapelisepofas.weebly.com/uploads/1/3/4/7/134762307/bulux-rabejokatuf-lirob.pdfIn PDF document text
    • http://fudetigupapafa.22web.org/50998739141.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/2155390.pdfIn PDF document text
    • http://chambrely.xyz/history_alive_the_ancient_world_textbookr5ciy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484154/normal_60043e9ac62f6.pdfIn PDF document text
    • https://bafiredevidif.weebly.com/uploads/1/3/1/3/131384403/0f3f5ac06cf2.pdfIn PDF document text
    • https://ziduxaxeg.weebly.com/uploads/1/3/1/3/131380546/7228166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5fd2531c86044.pdfIn PDF document text
    • http://cenderaoriginator.com/how_to_check_sap_exchange_ratejx3c3.pdfIn PDF document text
    • https://bexokafosirur.weebly.com/uploads/1/3/2/6/132695536/c96b789d0c.pdfIn PDF document text
    • https://xufujakuzizam.weebly.com/uploads/1/3/5/3/135315974/2543658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_603b0250ea271.pdfIn PDF document text
    • http://vinograd.io/9562208990v2qg8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dafitigare.epizy.com/lemodilewawe.pdfIn PDF document text
    • http://tukozadagafewan.rf.gd/agriculture_information_in_english_wikipedia.pdfIn PDF document text
    • http://satonavuka.rf.gd/ich_guidelines_stability_zone_ivb.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_9d068507ad77480e998d6977893fc118.pdf?index=trueIn PDF document text
    • https://206c1dc7-391c-4b20-ac64-b63c97020fd4.filesusr.com/ugd/87773f_6eef3c749ebf4a3eb320140b1ce42c1e.pdf?index=trueIn PDF document text
    • https://369206df-e466-4f8f-9771-850d1edb33c5.filesusr.com/ugd/8fd5dc_fc35aadc1794471eb6f327e3fbc6cd46.pdf?index=trueIn 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_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 5040 bytes
SHA-256: ea2f88230ba7b4630bd757aac08c22e933a34be8de8fac6e5853155314a38079
font_01_sfnt_off00010778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10778 11204 bytes
SHA-256: a3266b501103d468102c67c34e4d1073a81f457e61ad18ac855db00e184af303