Malicious PDF — malware analysis report

Static analysis result for SHA-256 096fc3383348461b…

MALICIOUS

PDF

83.1 KB Created: 2021-05-12 17:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d01c089ba6628f95a0bada2fa8ebcd8a SHA-1: d67aca67779212b61a8e06d9552cfd4a219aec35 SHA-256: 096fc3383348461b4035a6538a071932dd58217c4bab9ccc7434dfb7b7ce8b21
184 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, appears to reference 'Cfa level 1 exam fees', suggesting a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://crophysi.ru/strik?utm_term=cfa+level+1+exam+fees+dec+2019 In PDF document text
    • http://swiss-gear.shop/63267263092dbq6x.pdfIn PDF document text
    • https://mezepimera.weebly.com/uploads/1/3/4/8/134860759/ed05ba12.pdfIn PDF document text
    • https://jixisejilikabow.weebly.com/uploads/1/3/4/2/134265892/davuw.pdfIn PDF document text
    • https://sulasaboxa.weebly.com/uploads/1/3/4/7/134767053/3403003.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/xudikizujopo.pdfIn PDF document text
    • http://allfreebets.ru/22982066800ym89h.pdfIn PDF document text
    • https://taroxeme.weebly.com/uploads/1/3/4/3/134358537/wijowen.pdfIn PDF document text
    • https://kebumemimax.weebly.com/uploads/1/3/1/6/131636814/243755.pdfIn PDF document text
    • https://korisupugi.weebly.com/uploads/1/3/5/3/135308649/74c9368894.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_7ce21afe01e04263a683ba759fd3ecbb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a13f2cf-6fd8-4a86-b121-78ca3edd4fb7/dumulujuraxufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d0c88c-bd94-4b13-8cd0-dcc41f0c8a7c/34141701987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f1b2381-2052-4741-9621-652f8107a7dd/rizutajetemuwamigoxepemex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a83dbc3-1edd-4549-87ae-f8c25b280e6b/diccionario_biblico_expositivo_vine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f0b3eb1-9f9f-4529-8612-d7137a65d981/el_conde_de_montecristo_resumen_por_capitulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/576983c9-885e-405a-b343-466f6e1a10c8/96445892281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ea3137-b61b-489b-914b-69bfe60b846d/kidovadadosifuzutamufir.pdfIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_3176eaf00e80474dabbbf025ac6dd42d.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_off000103c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C7 5588 bytes
SHA-256: 14121d7bba08d33ec0f64bb6deb101e05f57c027372e235ae29d045cbf571f78
font_01_sfnt_off000116c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C5 11504 bytes
SHA-256: 342d8273499a553a7b2f2410a1f59d6dd1039f3e518741a533828837e053411a

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