Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee82841ab706ba61…

MALICIOUS

PDF

72.0 KB Created: 2021-01-26 02:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c11a9dcea7d96731b1977ec9c0151513 SHA-1: e2f345edc009f4a501d6e605f4472a7e3668780b SHA-256: ee82841ab706ba615691bbe0d65a4c523e9bbf9c3a961f193a64181873b82797
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan distribution attempt. While no scripts were explicitly extracted, the PDF structure and link farm suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=harry+potter+bathroom+ghost PDF link annotation
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/366073.pdfIn PDF document text
    • https://zelosadu.weebly.com/uploads/1/3/1/3/131379518/36d7c93ef38d15.pdfIn PDF document text
    • https://kiragidemi.weebly.com/uploads/1/3/0/7/130775435/470ef0b4fdc.pdfIn PDF document text
    • http://fesavuxofogegil.iblogger.org/dragalia_lost_dream_summon_guide.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/dufugivejoxitixazo.pdfIn PDF document text
    • http://zinuvudoliku.iblogger.org/46159403447.pdfIn PDF document text
    • http://pipexob.66ghz.com/10787495977.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/jubiferekaka/android_sdk_installer_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/vuxaligonuware.pdfIn PDF document text
    • http://bapiwixobenilax.rf.gd/95245631876.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/88453883209.pdfIn PDF document text
    • http://wekolaxoretewov.epizy.com/rubber_sheet_machine.pdfIn PDF document text
    • http://poxemibusap.epizy.com/82665095366.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/75523279784.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/infographic_template_illustrator_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/hollywood_movies_in_english_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/captivity_2007_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/24_makeup_brush_set_guide.pdfIn PDF document text
    • http://jukikusikodopom.epizy.com/tesis_para_administracion_de_empresas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5F 5404 bytes
SHA-256: 110d6ee74a2ee6b0c914c5034105b932345903246e70022ea6a4cda4dd680225
font_01_sfnt_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 10928 bytes
SHA-256: 67855b2290ff439be6a481b1355a131753ca3c506cb092a421c2d857c1ba7aca

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