Malicious PDF — malware analysis report

Static analysis result for SHA-256 370b818bb22400a5…

MALICIOUS

PDF

84.0 KB Created: 2021-03-22 22:56:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 831a4502d2f70640292225ddf428b2cd SHA-1: 8baa0db7b881f1e6deda8562482d5c6829d09e19 SHA-256: 370b818bb22400a55a91a1d360c8170db160f6c8b0eb0f45ee2497614370573b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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
  • 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://resalured.ru/strik?utm_term=viva+self+clean+water+dispenser+parts PDF link annotation
    • https://cdn.sqhk.co/letarezetap/Gijjhq7/vepoxonojimugapotap.pdfIn PDF document text
    • https://cdn.sqhk.co/bikezuku/cieZdha/php_website_development_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407066/normal_6016fe06a2930.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fe5b1a7af16b.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/iiIeCgd/gadexasitepazezafelibefe.pdfIn PDF document text
    • http://mesutilixuta.sportsontheweb.net/canon_mx300_ink_cartridge_change.pdfIn PDF document text
    • http://fiwetud.scienceontheweb.net/concepto_de_administracion_publica_segun_autores.pdfIn PDF document text
    • http://repochka.site/a_short_history_of_the_movies_11th_edition68jpz.pdfIn PDF document text
    • http://kanshoper.site/21412999460ilqdo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486060/normal_6053ad4c8213e.pdfIn PDF document text
    • http://pek-24.cc/advanced_english_speaking_practice_onlineap2n5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500887/normal_6006efc138a86.pdfIn PDF document text
    • http://chategratis.online/fasabebikipelujufkfloz.pdfIn PDF document text
    • http://italywow.space/powezumr4e7l.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/6e809c4f-873b-40ed-a97f-a374795737ed/31741436139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd046250-458c-4ee6-aea1-bcfb940bbfdf/fusopufanugaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbbffd08-cf9f-42e1-9096-baece8a53103/28178793225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/957d7b56-c672-4181-9c33-d56f962c2c00/diferentes_tipos_de_grupos_funcionales.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/marco_de_referencia_arquitectura_empresarial.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_off0001069d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069D 5268 bytes
SHA-256: f758299cd2daf36a4382427f0aa9edd551c8c47494d40ce56e5d9ffb347df524
font_01_sfnt_off000118b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B3 12560 bytes
SHA-256: eee6422f2fc89ec9621c86ab56e10eb529669038ac748f2af2b13aae85dc8b0f

Open this report in the interactive analyzer, or submit your own file for analysis.