Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2e3f5b2f23bef1…

MALICIOUS

PDF

81.1 KB Created: 2021-04-02 04:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cf2849aa4373ddce30068db6b0a44f6f SHA-1: 07c14d46b79d2272e54f3938d57a38f03b2bf323 SHA-256: 1b2e3f5b2f23bef1ff252b2a67f67344c6750a12e89dd5a447430bf9933f9225
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the PDF is intended to redirect users to malicious sites, potentially for phishing or further payload delivery.

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://fokemale.ru/123?utm_term=bibliography+mla+format+example+website PDF link annotation
    • http://kekijojovif.sportsontheweb.net/zatog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467910/normal_601e40ec5b4df.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/ehd1zkI/nororawipurefadonu.pdfIn PDF document text
    • https://cdn.sqhk.co/vafizolubev/LVirajg/popular_city_warangal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_605fececc4ef6.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/budelepuvizilolize.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368767/normal_5ffe87ce7d00c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_6035af160b2f0.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/acute_lung_oedema.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/Vjihhjc/xugivexo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwivazud.onlinewebshop.net/tawukifumekik.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/technical_skills_vs_interpersonal_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/how_do_you_cook_ribs_on_the_big_green_egg.pdfIn PDF document text
    • http://bitines.myartsonline.com/what_does_a_simple_tax_return_form_look_like.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/41737242506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4996746a-ac64-413c-aed5-dc0a3484cd9e/is_dreaming_good_sleep.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/bametiravumonosukoker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ae8205-b642-4629-ab9f-cac0ea8f93fd/76656037699.pdfIn PDF document text
    • http://xurosuforudev.atwebpages.com/vigusakekazupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87c91dd8-e7b4-48d1-827d-5fd1fdc8834b/el_hobbit_3_pelicula_completa_en_espaol_latino_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21195718-b30d-4afd-97ac-f40e55d31ade/citizen_eco_drive_watch_e820_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87ed2104-4529-4b95-9225-04e0240824be/kigajapixir.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_off0000fcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDE 5764 bytes
SHA-256: f8a851bb1fa4d937d503f6783ef22097963a2901805c4ca342b9904e34be8007
font_01_sfnt_off0001107d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107D 11408 bytes
SHA-256: 29b385d634a1e0eb39653c9396dcacdf981fe02ae8fa708d6a2d348b4a0d69cf

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