Malicious PDF — malware analysis report

Static analysis result for SHA-256 8562eb8f2bd5dd2b…

MALICIOUS

PDF

72.0 KB Created: 2020-11-25 09:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3fac638905fe9897e98e7917eda399f7 SHA-1: bd365492d90565dc446012cdf94af7c1d9812fba SHA-256: 8562eb8f2bd5dd2b20d9f1cd058dc8b4ef7a98987cd562148f3534b814559cf6
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The document's content is minimal and likely serves as a lure to click on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/aws?utm_term=size+guide+for+gucci+belt+bag PDF link annotation
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/dekek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5fba3ba8ca990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412570/normal_5fbb4012df928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f90dc5ba6f73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412394/normal_5f9569968d659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5f9526c18d765.pdfIn PDF document text
    • https://desokopozo.weebly.com/uploads/1/3/4/4/134473980/mozusotimivilele.pdfIn PDF document text
    • https://malodarugamizo.weebly.com/uploads/1/3/4/8/134853004/300977.pdfIn PDF document text
    • https://sixodajumam.weebly.com/uploads/1/3/4/3/134311071/5249136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410418/normal_5fb2f1ad45247.pdfIn PDF document text
    • https://foseduvix.weebly.com/uploads/1/3/4/4/134491956/f8929fececd.pdfIn PDF document text
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/f6ce2.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/1c1d3431-a08f-4775-a7d6-ce8820543d5d/20906833147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf7feabb-04e7-4eb0-987b-4355e84c1d2d/xunoti.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/how_to_update_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/irish_blessing_poem.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_off0000ce06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE06 5080 bytes
SHA-256: 2be57f2a6c8c115de3a1a616ec8483db2ed538407aa80d400dc437bbd25199a8
font_01_sfnt_off0000df63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF63 10960 bytes
SHA-256: 5978182b4d17c6dfa3278e2d55f9d75b7704871ff4516683ba1ec55eaefaff64
font_02_sfnt_off000104b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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