Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9d194141575945…

MALICIOUS

PDF

105.5 KB Created: 2021-03-28 04:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 906cac0d2d67ccc7767bb68fd85f84bf SHA-1: 530013c77abc6a30b4afa250c223d36aa2791642 SHA-256: 8c9d1941415759450307f2270e02476887cae475e1e055f05191feda2fa074a7
156 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 0.9993

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
  • 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.
  • 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://xezojetit.ru/wix?keyword=provisional+diagnosis+meaning PDF link annotation
    • https://cdn.sqhk.co/jifegusewe/phijhf9/xobalasep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459916/normal_60173fd15d3c2.pdfIn PDF document text
    • https://cdn.sqhk.co/vilosezuj/gje3hhm/goat_simulator_waste_of_space_free_download_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471996/normal_602c3045b05b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_603c5a6c24d22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420911/normal_5feeeaedd9d34.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxujagemo/jgcklhc/danewubopulotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428039/normal_604813741cbd1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/xss_filter_bypass_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb8d66c-6301-47eb-99e0-970ab6d2077d/80865743379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5092cde-7dda-4799-83bd-9852d584c906/troy_bilt_tiller_used_prices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82acb3ce-9a90-41d5-9e26-352206682cf7/xugogefitaxufamizivofakeg.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/maplestory_meso_market_guide.pdfIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_57af803c226f463c9e347c7aaa664fbb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e66a21e-dc30-4535-974a-c1dae5be5825/21176576844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f40864-bdaf-4865-bdb8-262fdfdaf0e6/pixumanezogurokibefoza.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/41792740250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/958bf158-bf8e-45b9-8ca0-98212b78ba7c/my_troy_bilt_edger_wont_start.pdfIn PDF document text
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_15b326cf836f4c43b811b99f68991a58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazofi/standard_enthalpy_change_of_neutralisation_chemistry_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab640d7-bc41-4b49-841e-6a86db9ec486/cursos_de_ingles_online_certificados_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcf7cd9e-9767-4a06-8413-810c0f314950/estructura_del_texto_descriptivo_para_nios_de_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d15be38-2dab-4f64-99e4-412bf3f03b27/misurujazonukuriwesuw.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 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16262 5208 bytes
SHA-256: 4764d0a45871579a1948e48bbf758070392ab858462c61ccb33a50427b05dc84
font_01_sfnt_off00017406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17406 10652 bytes
SHA-256: 2eb0853916209dd018b516fb506cc0495f02d96a5044b24e4c21b4f3962363f8

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