Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14769c10b5695a4…

MALICIOUS

PDF

77.8 KB Created: 2021-03-22 14:29:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 33e7795f961068809d3db5abb195563e SHA-1: d8fc9a27fe12815ccd8e90478f6a5c46e1f9ad46 SHA-256: c14769c10b5695a4d563ba75a0ca0f669592c4c0088c97ce3f73908ba84e44c4
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=lipo+cavitation+results PDF link annotation
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/5093609.pdfIn PDF document text
    • https://cdn.sqhk.co/rojogonezejo/cgjjfjb/66677668814.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/223785.pdfIn PDF document text
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/7383121.pdfIn PDF document text
    • https://cdn.sqhk.co/voxobidivel/hbl5xzG/two_way_traffic_meaning.pdfIn PDF document text
    • https://wutiduxa.weebly.com/uploads/1/3/5/3/135300785/nakosa-wibuvekerata-goxomaresebowuv.pdfIn PDF document text
    • https://cdn.sqhk.co/doburazax/giPjijf/62344535789.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/mxPhjid/cosmoprof_las_vegas_nv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0351d586-8a97-4a1f-8b8a-31054031d91c/viking_sewing_embroidery_machine_reviews.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_b8b93622f41f41c3aaa271e8d8e090b3.pdf?index=trueIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_a5f46f367a6e46eaaa00740f618b0f57.pdf?index=trueIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_4e7c2127e47c4721ac456a4a0eff6cdc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da522a1-518c-4934-9106-e706fc56f961/kotug.pdfIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_45bb7cad84da44ee85ed37605d0eb22e.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_823dd94faa634164899dd67189727989.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e0f81b2-7ed3-429f-a687-ac823c2aa5cf/feredalekifinitaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d22d86-047e-41f9-b333-25e6abb07639/gobuwonekufigozu.pdfIn PDF document text
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_bca5b116f2d5431c83e5cbc5f0fe16ca.pdf?index=trueIn PDF document text
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_ced6a218b49a452181cc24892cc1fcc8.pdf?index=trueIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_919b6373613b4453aa94ec9637fda4c8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf4e6a2-e13b-4478-96bf-cbba83847623/nepewajotemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f581933-5132-4b97-a641-28639f11ea4a/23715144130.pdfIn PDF document text
    • https://ddd90330-5837-4e0c-b2f6-9383941cd2db.filesusr.com/ugd/568e2c_a665431b7ba849ad89b77727252af238.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_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 4928 bytes
SHA-256: fc7fdaeedc3a51fcfb54e2ad769462041c973f9f567681fc164fa8c670f831a2
font_01_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 10988 bytes
SHA-256: 34a80c0991e5b1cc27f9407c186b294d143fce27aa6ea769d1bfe12486873cc3