Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bdfe042feac879…

MALICIOUS

PDF

93.4 KB Created: 2020-12-26 17:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 53b3b3518b218cf35c9fb8394e6b5cf7 SHA-1: 79775255c090e8f06c75b44c03931e30cc05121e SHA-256: f5bdfe042feac8793eb21364f111a7ea0bbf25927cc8187522f8a5c71a079dae
186 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to external URLs, including a suspicious domain 'traffnew.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://traffnew.ru/strik?utm_term=head+soccer+champions+league+2017-+18 PDF link annotation
    • https://cdn.sqhk.co/nopawuwam/LjeK1fc/95991320542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421959/normal_5fc526e1ea0ff.pdfIn PDF document text
    • https://kelinabak.weebly.com/uploads/1/3/4/7/134728495/6303616.pdfIn PDF document text
    • https://livakazogoje.weebly.com/uploads/1/3/4/6/134622539/pepakezoso.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/rivuwofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5faa81bdb5498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5fd1cde42034d.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/wafimujilo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/5973058819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c12402d-cc93-43f6-96c6-45268492431d/intelligence_from_secrets_to_policy_lowenthal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2550f7a-1891-4ef6-bee0-ba4b0b703ad4/talobumov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2ad137-5490-4b16-be54-74e25fa26d4a/biological_molecules_worksheet_answer_key_pogil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b758f136-0533-4113-97e6-0d286fa5c824/mais_c_est_quoi_cette_mamie_streamin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7baa5a3-2b87-496e-9b67-f5c971b1d0b1/sipikefifat.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_off00012975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12975 6080 bytes
SHA-256: 1461a572d1d1067fba350d1f3948bddf017345e7e15b40d8ca2f1de66139572f
font_01_sfnt_off00013e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E0C 14124 bytes
SHA-256: a1ad3ebbcb90012aaf2abe99967b34f45112d633d9d563b3d551afa0babe18e9

Open this report in the interactive analyzer, or submit your own file for analysis.