Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ea328707b23b4e…

MALICIOUS

PDF

93.7 KB Created: 2021-04-07 01:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 46b3d1f6849da57f3c07c5c9c068cd38 SHA-1: 9d557576b6d260c34abc36c21e319f792656d5ca SHA-256: 74ea328707b23b4e51d203d25d72d7fbae7a66a0ac01ef78c576d542ae440626
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lead users to potentially harmful content, possibly phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/strik?utm_term=what+is+northern+renaissance+art PDF link annotation
    • https://cdn.sqhk.co/ropikenetu/NQThegc/skyward_cisd_login_crowley.pdfIn PDF document text
    • http://roboludawu.mywebcommunity.org/microsoft_office_for_mac_catalina_crack.pdfIn PDF document text
    • http://jologedeb.getenjoyment.net/base_de_dados_distribuidas.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/64891024684.pdfIn PDF document text
    • https://sasominafa.weebly.com/uploads/1/3/4/3/134362810/dedirovivoresumejexo.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/dZ9VgiO/96214341019.pdfIn PDF document text
    • https://sawuwirepugasup.weebly.com/uploads/1/3/0/9/130969548/nuzuma.pdfIn PDF document text
    • http://katipef.medianewsonline.com/what_is_introduction_to_philosophy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_6010c8d2e4481.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/jgg8jex/32862712018.pdfIn PDF document text
    • https://cdn.sqhk.co/didatife/hRZgf5s/space_drone_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/jdjaoha/yellowstone_season_4_filming_in_montana.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/iaLghhc/38658016701.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/19724955213.pdfIn PDF document text
    • https://pubategikosiw.weebly.com/uploads/1/3/4/1/134131453/04324ff927abb.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/nordictrack_act_commercial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_600e952195090.pdfIn PDF document text
    • https://cdn.sqhk.co/filodomazora/gXegjjc/81359560352.pdfIn PDF document text
    • https://cdn.sqhk.co/gilikomow/iibjhDu/oval_bassinet_sheets_16x32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://miganuvag.myartsonline.com/98301164611.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_off00013579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13579 4868 bytes
SHA-256: fa5f5fa0156bcfcbb4b544284bfc33116f202c98c661dbfabdab7817dd242356
font_01_sfnt_off0001460c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1460C 10544 bytes
SHA-256: 4c6876292776f9f595aad4a6cab7aa5be8f8e2895072a18438fae7ec6a40fbe5

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