Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d00f3d24af4b3e…

MALICIOUS

PDF

80.1 KB Created: 2021-03-29 10:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0f007fca6f80b9c02f25de3d2f07c151 SHA-1: 7e8cf2098a49abbb5529295ccc2d2bbaea12f9be SHA-256: b8d00f3d24af4b3e98b70cb3fcbe4a6411e78f590d31189643a8172a93f1cc57
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism to host malicious content. The document body, though heavily obfuscated, contains text related to technical guides, indicating a lure to trick users into visiting these external resources.

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 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/wix?keyword=connecting+networks+v6+companion+guide PDF link annotation
    • http://kutufirix.iblogger.org/cakephp_form_helper_method.pdfIn PDF document text
    • http://msertis.xyz/bitametebuwmsgz.pdfIn PDF document text
    • http://vekowen.getenjoyment.net/13928519314.pdfIn PDF document text
    • http://zarabatyivat.ru/xulewedigilafogisotipefiyjr6v.pdfIn PDF document text
    • http://s7hmus.org/94295582964se3qd.pdfIn PDF document text
    • https://jabikazisejifo.weebly.com/uploads/1/3/1/6/131606509/2fd405.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/finding_volume_of_prisms_and_cylinders.pdfIn PDF document text
    • https://zakoponuzu.weebly.com/uploads/1/3/5/9/135992890/rijifosuvona_sagegeloduwemal.pdfIn PDF document text
    • https://xatoxelal.weebly.com/uploads/1/3/1/4/131482937/6530443.pdfIn PDF document text
    • http://fiterewupaz.22web.org/android_studio_documentation_window_pops_up.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nupifikitove.epizy.com/tejasapimaxe.pdfIn PDF document text
    • http://keporumutiwem.epizy.com/la_libert_des_anciens_et_la_libert_des_modernes.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/how_to_rekey_a_gatehouse_deadbolt_lock.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/eagle_applied_physics_1.pdfIn PDF document text
    • http://bujazux.rf.gd/81898051210.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/duwini.pdfIn PDF document text
    • http://vukefuxi.epizy.com/34373750401.pdfIn PDF document text
    • http://femiworuw.rf.gd/vaporesso_renova_zero_all-in-one_vape_pod_system.pdfIn PDF document text
    • http://puzasapexuwuju.epizy.com/nixubav.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_off0000fa9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9C 5636 bytes
SHA-256: f039ce3d30161c3815092e84dc41983813067c474d76392a94a44d273f01fa1a
font_01_sfnt_off00010dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCD 11140 bytes
SHA-256: abaedd2bc5dbe96dd42176bf0600264a739044bf0d0bc132f05d491470aa1c76

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