Malicious PDF — malware analysis report

Static analysis result for SHA-256 817fde5a2b696940…

MALICIOUS

PDF

81.0 KB Created: 2021-03-02 10:38:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 024bcea09f7fd86f1ba2a3c8485e441b SHA-1: 062d7fec2da3546b71be0beb2eb3038f67fb893c SHA-256: 817fde5a2b696940e199dde28dc3be747264648d77422cb74fafb2449c72481e
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=kwikset+electronic+lock+manual PDF link annotation
    • http://clobuss.ru/gewutasakurifajejofumanqrudv.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/rawogonozabeme_bufozegug_mafuju.pdfIn PDF document text
    • http://penageli.getenjoyment.net/can_you_use_a_universal_remote_on_a_hisense_smart_tv.pdfIn PDF document text
    • http://opssmall.space/635442657503fln2.pdfIn PDF document text
    • https://nenawopoweso.weebly.com/uploads/1/3/1/4/131406478/riritoguzotejeze.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/jhS3ege/4719421363.pdfIn PDF document text
    • http://hookup668.site/46833901013sxdul.pdfIn PDF document text
    • https://mafadojidakiwo.weebly.com/uploads/1/3/1/8/131871721/cd747a9.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/ghehihe/obsidian_armor_mod_for_minecraft_pe.pdfIn PDF document text
    • https://pefisidedufe.weebly.com/uploads/1/3/4/9/134902532/kojamodijina-nojomefikobefo-vegemuluxas-dugokoka.pdfIn PDF document text
    • http://agentsecure.space/masaaki_imai_biografiaxoq0t.pdfIn PDF document text
    • http://bitiwiz.medianewsonline.com/93442015215.pdfIn PDF document text
    • http://milanomodaitaly.site/jubixasoda1oklz.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/how_to_study_for_acls_certification.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/93250149255.pdfIn PDF document text
    • http://raifaisentgo.online/98765395619pl5qs.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jchdigv/color_detector_app_free.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/bikogose.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/gecQajh/lonupe.pdfIn PDF document text
    • http://idclick.cash/what_was_the_great_apostasytldpm.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/jugobimuraje/fisujatatimokixameti.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/free_ebook_apple.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_off0001029b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029B 5072 bytes
SHA-256: 93d76e3da6aa37366fb362eeb3dc8f46248a4438e20af81c1d3d7caf8376401f
font_01_sfnt_off000113d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D5 10044 bytes
SHA-256: a403d85f1880e3ee387f78c0e4e6ff05edc73be08c1f2c521532586b2924e628

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