Malicious PDF — malware analysis report

Static analysis result for SHA-256 86eb5b5e86fab03b…

MALICIOUS

PDF

63.4 KB Created: 2021-02-27 15:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5b5f6b76a0373ea5a2fb922eeaa5cdd6 SHA-1: 482a4264b558e835aaf40fabda99059b930ebba8 SHA-256: 86eb5b5e86fab03bf58cc82d87f26fada9db495f663d804ba51d71577db47442
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8608

Heuristics 4

  • 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
  • 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://crophysi.ru/strik?utm_term=does+delta+pay+for+flight+attendant+training PDF link annotation
    • https://cdn.sqhk.co/rogenujudita/fIwibhc/mars_robots_ultra_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/Ipgiif8/orange_tree_golf_resort_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/ja6S7ie/12456856300.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/25701454557.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/gihaigS/adamantine_armor_erza.pdfIn PDF document text
    • http://manovina.mypressonline.com/skyrim_special_edition_how_to_install_mods_vortex.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/xexetivoludipepibaxibexi.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/can_you_replace_a_fire_tv_remote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/is_the_jbl_flip_5_completely_waterproof.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/bubajasazaripelolage.pdfIn PDF document text
    • http://duvodix.myartsonline.com/96825443568.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/pulorizanenerutami.pdfIn PDF document text
    • http://govogudumig.epizy.com/office_attendance_register_format_in_excel.pdfIn PDF document text
    • http://nixomirorubu.myartsonline.com/26995741445.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/ferurenosipupepe.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DA 5404 bytes
SHA-256: 6faee99013fac0911e99e0f5f34dc9497aba571110b0b68aa1065cbfe447817b

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