Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ed0098f316683e…

MALICIOUS

PDF

77.5 KB Created: 2021-03-16 13:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2148b437e5776ad8b97e591b5bc242af SHA-1: 25eef89126dd3213dcd8964932c335561282640e SHA-256: d1ed0098f316683ee8bc171c7aa25cb5750ec1eda8ac633ed41b29b9c8f9599a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/123?utm_term=chikni+chameli+video+song+mp4+free
    • http://giwapuse.22web.org/top_10_smart_watch_under_5000.pdf
    • http://serikanipesemo.iblogger.org/rosipesupugegivorol.pdf
    • http://kefudepoduwudi.sportsontheweb.net/anarchy_in_international_relations.pdf
    • http://tiwilofojifig.sportsontheweb.net/fuziwenesonu.pdf
    • http://xonesasa.iblogger.org/broadcast_news_script_template.pdf
    • http://vinuporabomod.iblogger.org/63821884582.pdf
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5fddfce3749fb.pdf
    • https://cdn-cms.f-static.net/uploads/4485156/normal_6036c87d8d133.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_e0fd91d3b8d7421fa90b6bc27e579203.pdf?index=true
    • https://s3.amazonaws.com/fofeguj/lords_of_xulima_deluxe_edition_guide.pdf
    • https://s3.amazonaws.com/vigevot/aquatic_plants_and_animals_information.pdf
    • http://furipurisebete.onlinewebshop.net/niveles_tipos_y_barreras_de_la_comunicacion.pdf
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_147f30cb2e704acdb13c30dfc63e8c91.pdf?index=true
    • https://s3.amazonaws.com/gajakelegeza/57767384926.pdf
    • https://s3.amazonaws.com/senodiw/wazozaredogel.pdf
    • http://ditanumugagoma.myartsonline.com/loboju.pdf
    • https://s3.amazonaws.com/pewibim/nivurekawaf.pdf
    • https://s3.amazonaws.com/xovajukoxin/isosceles_and_equilateral_triangles_number_line_worksheet.pdf
    • http://jobifizokugo.rf.gd/89672565561.pdf
    • https://00f02ae0-031c-4cf4-85c3-86bbc6d7deb2.filesusr.com/ugd/13f2e4_fc3873f93d3c4fc4bae531eb1f281479.pdf?index=true
    • https://s3.amazonaws.com/kesumasaka/vozibejutidojun.pdf
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_a8b23a2e70af48adbe55ed331c1c5627.pdf?index=true
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_571304e01b2f4996a5703e0c6265299a.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb0.bin
58685d785418205e16b83aa7bcf2b4137db6cec6d5af69be015fc73c5ae22256		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB0 5684 bytes
font_01_sfnt_off000100eb.bin
be5f3b90cc4b45ee041c38077e0497a0a1e5311c73aaf095f73149fe27810447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100EB 11716 bytes

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