Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e40c70c36f09b7f…

MALICIOUS

PDF

74.8 KB Created: 2021-03-23 16:20:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1e22842afffd854b4241d254889350db SHA-1: 69588e2de8218c563b6a7abc017ea6ebe5fae2a7 SHA-256: 1e40c70c36f09b7fb248a153891950b7db6c9cd8bb91b6b47511d8f44471cd5a
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content, potentially leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=commonwealth+of+ky+child+support+worksheet PDF link annotation
    • http://faceskinagainbeauty.xyz/87037112785epdbt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503524/normal_5fea106d720cc.pdfIn PDF document text
    • http://vevaroda.scienceontheweb.net/nilewatadas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377109/normal_5ffcf14bc6015.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/66b4e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501028/normal_6052f3363ac42.pdfIn PDF document text
    • https://demutarovawo.weebly.com/uploads/1/3/3/9/133997894/8550683.pdfIn PDF document text
    • http://kudretbozaci.com/star_wars_legends_novels_chronological_orderjgotf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5fe8318c406d8.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/5275465.pdfIn PDF document text
    • http://reduslim-ordina.site/best_tile_material_for_kitchen_backsplash7j7j8.pdfIn PDF document text
    • http://mesretly.xyz/27952661471ttl8p.pdfIn PDF document text
    • https://xesapexoxes.weebly.com/uploads/1/3/4/6/134633169/9176674.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/37693343701.pdfIn PDF document text
    • http://kobodesuwid.getenjoyment.net/doxope.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jofikuv.atwebpages.com/oxford_word_skills_intermediate_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77eac621-881e-46d2-89a0-3c25d8157d01/kick_2_movie_director_name.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617d5472-a550-4e6c-b9d4-8dad6589c0c8/5th_grade_area_and_perimeter_word_problems_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f311e09-36e3-412d-9bc2-5e2983220df0/how_to_write_a_diversity_statement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f08bc743-44c1-456e-b621-5a57844bb218/dream_meaning_snake_biting_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae23a8f-1a4f-4baa-8f19-d3723875b7d1/5_verbos_regulares_en_ingles_conjugados.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_off0000e637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE637 5560 bytes
SHA-256: 483698dd5763c35cc898297494910cfbb9c2301f95bb397a756fc3f5ebf17d4e
font_01_sfnt_off0000f90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90B 10824 bytes
SHA-256: 2148c2bc94d21299c7fde7a61d7bcd05d2a3118b27988b677686134e33be305c

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