Malicious PDF — malware analysis report

Static analysis result for SHA-256 556987ce8f4ed2f7…

MALICIOUS

PDF

85.5 KB Created: 2020-11-26 12:57:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: aea1bf08a73376f22c8cd465b9e44c7e SHA-1: d687ac615cb03eec8919ceff934a900d56422921 SHA-256: 556987ce8f4ed2f777866673fa56ec298eb879a606a735d516ec4a9c2652ab15
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • 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://traffmen.ru/strik?utm_term=ice+age+4+telugu+dubbed+movie+online+watch+free In PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/dawup-dufoka.pdfIn PDF document text
    • https://dikabapor.weebly.com/uploads/1/3/4/6/134620412/xatipovosi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457861/normal_5fa99466e85ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_5fb9493471b79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/33db42a7-2b95-45af-b15e-bd7183cb329e/golds_gym_competitor_series_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/modelo_de_negocio_canvas_para_un_restaurante.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/mufapunevovakigusajepis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/780fb1ef-2c4f-43c5-b104-7e07168c5320/gikijaxamilemafanetagu.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/appsc_govt_polytechnic_lecturers_notification.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/anterior_cruciate_ligament_treatment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13605d97-d82a-4c99-90b2-7591caec1e5a/pompe_injection_cav_4_cylindre.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/star_wars_a_new_hope_watch_online_123movies.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 5456 bytes
SHA-256: 29809e0c404124c8c8b1eb9e6146a52f96dedfe0f8b1f2ffdc402a562839df43
font_01_sfnt_off0001172b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172B 10348 bytes
SHA-256: 6b888b630db193de7944903a53564bd124a260119f0c17ff7c2e17885ec98cd0
font_02_sfnt_off00013aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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