Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94ea6f34a8501fb…

MALICIOUS

PDF

72.7 KB Created: 2020-11-10 08:37:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fb456bc1727409ed3080459629d2c1c9 SHA-1: 909b304f4b8c8931f7f10d606e33451b4879811b SHA-256: c94ea6f34a8501fbb15fe606dadfe26adaccc98f1e49b85474c22704f7b808ea
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://trafficel.ru/strik?keyword=wiersbe+commentary+jeremiah PDF link annotation
    • https://vuwakoge.weebly.com/uploads/1/3/4/3/134368269/doxasa-vesovowox-gifow-bigeseru.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/sakufobe.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/de461ec89e.pdfIn PDF document text
    • https://fejufawos.weebly.com/uploads/1/3/4/3/134328201/7795569.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/nalizaseve-konirajo.pdfIn PDF document text
    • https://ganubosi.weebly.com/uploads/1/3/4/5/134506756/f4f77f14c.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/wexaboninikig_wurodirup.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/motusakerajare-zizakaj.pdfIn PDF document text
    • https://lojixakukitut.weebly.com/uploads/1/3/4/6/134605905/fudawore-tunujofeteraj-niveluraji.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/6789685.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/499b29c5-5a0c-4773-9ef3-5cd296f610ae/48118564111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3daac53-267c-4dc4-894e-8b0f3b3215cf/sas_statistical_business_analyst_certification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9593c787-64d5-4c2f-be3e-a8f6c10cd734/payday_2_flush_gpu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c0aa87-7649-4c7d-9056-db3084af63ab/2000_audi_a4_quattro_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/caracteristicas_del_estado_social_de_derecho.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_off0000dfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE7 5336 bytes
SHA-256: 807a3b18e797aba6fcf8091b3cbed6eb84ec1a7f6d9dd2e5c37116cc7a6b4218
font_01_sfnt_off0000f1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F8 10600 bytes
SHA-256: 7237a025166983b9bd21e960f31ab10fb97851a8b031bfc87cc96d3e58793655

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