Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab88e7806ec734b6…

MALICIOUS

PDF

89.2 KB Created: 2021-06-11 02:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ad6a1a2580e8cceee3345be6ee6ea6a0 SHA-1: a8c7f59e8aa900ef51a286a26e3a7b04b7cc4c26 SHA-256: ab88e7806ec734b6fe8620c7ab5024537903c51d9f5d771383c96918baff0d18
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. The document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic to distribute malicious content. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly suggest an attempt to redirect users to malicious sites.

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://pixomot.ru/pbw?utm_term=bigfoot+cartoon+full+movie PDF link annotation
    • https://rujedupexiveviz.weebly.com/uploads/1/3/4/8/134874221/tategalejem_debiwe_gijexavudogebi.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/migimasizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417527/normal_6040f45e6a072.pdfIn PDF document text
    • https://xisiwazebisa.weebly.com/uploads/1/3/4/7/134758569/perovison.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497353/normal_605f84e858b89.pdfIn PDF document text
    • https://lipijubirenazob.weebly.com/uploads/1/3/4/7/134722159/malejiwa_nogulop.pdfIn PDF document text
    • https://nodizolubuta.weebly.com/uploads/1/3/5/2/135297944/2872461.pdfIn PDF document text
    • https://sasujenag.weebly.com/uploads/1/3/5/3/135337218/rukogibix.pdfIn PDF document text
    • https://powedumino.weebly.com/uploads/1/3/4/3/134350182/4523588.pdfIn PDF document text
    • https://zideloxilatomi.weebly.com/uploads/1/3/5/3/135325243/7155269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_60c295b713c06.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/wibokevixegapisurine.pdfIn PDF document text
    • https://jowavuzawevubab.weebly.com/uploads/1/3/2/3/132303017/1291297.pdfIn PDF document text
    • https://xuzanuvu.weebly.com/uploads/1/3/7/5/137508084/b765bd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_601555aee07d4.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/71ddf177-c3a9-474d-95d6-c2fd80b71aeb/mudomavexojojaralojuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc8041f-3139-484b-8c16-2e703ba0fa73/rofoxeluregosobavabesoweb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965c0c7d-e01c-4bd5-9b2f-34f95262f343/como_fazer_tabela_nutricional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a3ba1c-9c5e-4fdc-85fc-ec320a0a8464/how_to_program_dynex_tv.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_off00011f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F19 5132 bytes
SHA-256: d7932058b7431f6c0a360e7bccd811b40a1f358c3bfa5b5bf4d82870ece22bb2
font_01_sfnt_off00013090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13090 11596 bytes
SHA-256: 52bcfaf802d786e0d61a473eb8e7686afc069046e3ac652a42d5a95b9ed53a69

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