Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede18f55223bce87…

MALICIOUS

PDF

134.6 KB Created: 2021-03-22 20:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 34d7623f07779ddf30ddc38bfbdd7103 SHA-1: 94bec9eb2eb88522f06f07531999039bf3de2765 SHA-256: ede18f55223bce876aa5f6894f8ab723216cb89d198900d0dfe27b2b16ed240a
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO abuse. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://baarspo.ru/strik?utm_term=brown+versus+board+of+education+defined PDF link annotation
    • https://puxupukesif.weebly.com/uploads/1/3/0/8/130813524/vopemegib_womepoweton_dedivegexokul.pdfIn PDF document text
    • https://kasadinup.weebly.com/uploads/1/3/4/6/134641165/birirufasefen-wojifokeda-mesutekesuju.pdfIn PDF document text
    • http://idslim-italia.site/xixefudidakoseferuneremitfi43.pdfIn PDF document text
    • http://pizuwujigajanen.medianewsonline.com/questes_administrao_pblica_cespe.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/17907889197cy7bj.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/15197005085.pdfIn PDF document text
    • http://flebolog24.com/aci_cold_weather_concrete_definition5ngke.pdfIn PDF document text
    • http://ens-pictures.ru/oedipus_rex_drama_scriptytpjs.pdfIn PDF document text
    • http://roskycnmx.com/59971860572n3n6p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_dffa806de2af471696c0bebd3be9ac56.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd52900f-8059-48b6-b150-ef6fd43f0848/where_are_coleman_air_conditioners_made.pdfIn PDF document text
    • http://tibobabinenan.epizy.com/67561663946.pdfIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_decac320c4294308b0088f61eea0b035.pdf?index=trueIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_0e40df17cddc4f2191fc9dd5cdc13e02.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/48fcf984-cff1-4b91-8222-d2f8f16f4a46/ruralolobuxaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ec45ceb-d045-4ea6-8cab-740f5ea16ea2/lonit.pdfIn PDF document text
    • http://zakagoxufi.epizy.com/debavevorabiluzum.pdfIn PDF document text
    • http://piwugolixero.epizy.com/how_to_connect_iphone_to_merkury_speaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ee0686-cd3c-41ce-b6ba-4d52ed4857f4/duwinibelilojalatenavokax.pdfIn PDF document text
    • http://tugefewose.rf.gd/penyebab_diare_pada_bayi_0_6_bulan.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_off0001d169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D169 5324 bytes
SHA-256: e65af7353c95950be58e625a8b783080dfb47a44d55b95d012443380b37d5dbf
font_01_sfnt_off0001e3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E3AD 12536 bytes
SHA-256: e177f021db6f52c1b607a5824b1bf2ecf3c9e6328a29e119a39d96725cc4566f

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