Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92c6447b93cfe26…

MALICIOUS

PDF

63.5 KB Created: 2021-03-11 13:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 725d579650a944f269290abe93dfc12a SHA-1: c3b590abde38f428e9239c58a433e6f79ae2d1b9 SHA-256: e92c6447b93cfe26b0e3d82ff3e3e726a95212a3b1f2a029698bf6d59189a100
184 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier flagging indicate a high likelihood of malicious intent, specifically identified as Pdf.Phishing.Trojan. The embedded URLs and the document's structure point towards an attempt to exploit users through deceptive content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9059

Heuristics 5

  • 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
  • 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://resalured.ru/strik?utm_term=what+are+the+five+key+managerial+skills PDF link annotation
    • https://janodiwuzujemux.weebly.com/uploads/1/3/1/3/131382133/lifulodopi.pdfIn PDF document text
    • https://dowanudamedi.weebly.com/uploads/1/3/1/3/131398164/senan_navukixikakofis_nopameruxidobo_tafigolalifexo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465390/normal_5fd669f90e325.pdfIn PDF document text
    • https://sopebanodi.weebly.com/uploads/1/3/4/0/134017095/dc034.pdfIn PDF document text
    • https://bobovisosusare.weebly.com/uploads/1/3/5/3/135394734/xusowumunedotiwu.pdfIn PDF document text
    • https://buginibonimej.weebly.com/uploads/1/3/2/7/132711973/xokukufewokaneletujo.pdfIn PDF document text
    • https://xiligori.weebly.com/uploads/1/3/1/4/131411896/5767353.pdfIn PDF document text
    • https://tetiwaxope.weebly.com/uploads/1/3/0/7/130776033/garamukekadonovewa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425515/normal_5fe01c548c306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_60383ae3bd112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_6027bd0f99d3d.pdfIn PDF document text
    • https://zosonokabawim.weebly.com/uploads/1/3/4/3/134316026/7450857.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_6ceb7564f3bc4550ad7e7afe172e670a.pdf?index=trueIn PDF document text
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_83193d291d7e4e5abc4096b57b6fe673.pdf?index=trueIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_ce905e0071cc49cc81641e125497636c.pdf?index=trueIn PDF document text
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_29abd3c57a7f48428ce49b3a3320c8bd.pdf?index=trueIn 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_off0000e53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 5420 bytes
SHA-256: e22e268ded292ebb2e0c73f44cd5db26fbd246a7032e11440dc06e3d4220253d
font_01_sfnt_off0000f792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF792 2328 bytes
SHA-256: ff84c947858d90d6aa0c370b666b6e7d96480fd7470e027f02c44ad291dd7c3b

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