Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6593f2e1bfd6647…

MALICIOUS

PDF

125.9 KB Created: 2021-04-13 18:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8c58a8bd3b6adef9fd6884fea3523685 SHA-1: 294705040e3ec5a2dcbc139a7f23356257d0d01a SHA-256: e6593f2e1bfd66478aaba84535f1675bfda5aeb001f11708d21f4259b15a3dfd
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a disposable hosting domain, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead the user to a malicious site for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack.

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://jacksth.ru/strik?utm_term=what+are+the+two+types+of+wiring+diagrams PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464067/normal_6026d04637134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_60293222723cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464730/normal_5fd1fafa78ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_6030ecf13a8be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_6014919b5589f.pdfIn PDF document text
    • http://pobopel.iblogger.org/59001706253.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/4483f4ba-79d1-4f0d-ab6b-508960e7c51a/44732711787.pdfIn PDF document text
    • http://xuvanav.epizy.com/basel_convention_1989.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/what_are_the_three_control_structures_in_python.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/hamilton_beach_rotisserie_convection_oven_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/rubber_gasket_material_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da391c3b-6178-4aef-833f-e67ef65fd71a/tozogubibepejudinaxiwilis.pdfIn PDF document text
    • http://paxubar.rf.gd/declaration_of_independence_questions_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ee0c0c-6532-4aa7-b28c-de89f1614311/89013362508.pdfIn PDF document text
    • http://kizuwopo.epizy.com/45299884800.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/banega_ab_mandir_song.pdfIn PDF document text
    • http://jatotixizajud.epizy.com/41045066842.pdfIn PDF document text
    • http://jofesosozofoso.epizy.com/82003637173.pdfIn PDF document text
    • http://perorudo.epizy.com/58921051005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fce5b32-9d4b-40f4-9dc6-33ad2cc940a2/se_puede_llevar_cafe_en_el_equipaje_a_estados_unidos.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_off0001af19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF19 5628 bytes
SHA-256: 9c3cc8efb2930a3af34c81c4ed00872dfc0ccbd5ddf57f8b600a58445fb9338b
font_01_sfnt_off0001c239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C239 11660 bytes
SHA-256: a28684b8dc04464a608feebfa573067ba4e2b821303432804b976c70c0563bca

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