Malicious PDF — malware analysis report

Static analysis result for SHA-256 e590c8ff358f9693…

MALICIOUS

PDF

79.5 KB Created: 2021-03-09 06:00:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4051bd82475b99154137585da15dc5fd SHA-1: 79fdc886a2a1ae2593bf5ab1e1fc773641925081 SHA-256: e590c8ff358f969335a62a15ab098ee7142c135fb3400b6e69f67660eef352a6
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to business organization charts, directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/wb?keyword=organigrama%20funcional%20de%20una%20empresa%20comercial%20ejemplo PDF link annotation
    • https://kasasifu.weebly.com/uploads/1/3/4/6/134697732/zifujiragamufaju.pdfIn PDF document text
    • http://resugigujo.iblogger.org/2010_honda_odyssey_ex-l_owners_manual.pdfIn PDF document text
    • http://tagukefinifofe.iblogger.org/48741037509.pdfIn PDF document text
    • https://lazezareb.weebly.com/uploads/1/3/4/3/134311903/kixutonawet-gakak.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/gdLhDjj/doganewazibojijotixofiver.pdfIn PDF document text
    • https://wabibazo.weebly.com/uploads/1/3/5/2/135295983/7062617.pdfIn PDF document text
    • https://takadoturig.weebly.com/uploads/1/3/4/1/134108809/1475852.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/bissell_powerforce_bagless_canister_vacuum_cleaner_specs.pdfIn PDF document text
    • http://mufosubofamar.mywebcommunity.org/how_do_i_connect_my_logitech_wireless_keyboard_k780.pdfIn PDF document text
    • https://gifaxopolipo.weebly.com/uploads/1/3/0/7/130739444/23b164a.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/iRxhekX/96797447780.pdfIn PDF document text
    • http://bevibopo.22web.org/14018055038.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/Qgehaak/kendall_and_kylie_fight_over_dress.pdfIn PDF document text
    • https://lisumefi.weebly.com/uploads/1/3/1/4/131408082/638b1000f.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/dje8icI/zombie_diary_2_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/fDNLjYT/satanidozo.pdfIn PDF document text
    • https://febumade.weebly.com/uploads/1/3/4/7/134757335/8462517.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lepejojesel.rf.gd/naterikutadokulezilux.pdfIn PDF document text
    • http://tegumebedizeso.epizy.com/wewug.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/kexowafu.pdfIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/63478744211.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/tapoweneke.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/wafepitedatubibubinaku.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/aws_cli_s3_files.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE974 5380 bytes
SHA-256: 6c626d0817b9f693956a5b9d4d6ebec305a754d2f80191b690f84078bae175c2
font_01_sfnt_off0000fba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA0 11232 bytes
SHA-256: f214a751c997a5836f888d19dad3c0ddd09d2b7131ea779c17bff13a180943f7
font_02_sfnt_off00012009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12009 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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