Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9329e8a8735b20…

MALICIOUS

PDF

82.4 KB Created: 2021-03-05 07:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: e746c9a606fdef29cf325ad95047da86 SHA-1: 34d2e9f691791e2a51773901259ea81eb237e679 SHA-256: 6d9329e8a8735b20e22f36b6df00220e6977156163288a658a596766e25fab41
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://mezovuduw.ru/wix?keyword=comparing+unit+cost+worksheet PDF link annotation
    • http://leledup.mypressonline.com/graphic_design_programs_for_chromebook.pdfIn PDF document text
    • https://cdn.sqhk.co/wixikinotu/h4qjfha/dungeon_village_2._0._7_apk_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456165/normal_603a293d2af07.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/iiujiV9/58949975492.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/67332148499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501042/normal_6038449e6954b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491670/normal_602f958d4b7e8.pdfIn PDF document text
    • http://zawugexoj.22web.org/31555960496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381759/normal_601107463aa24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_6018f44b75a57.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/roland_td_4_price.pdfIn PDF document text
    • https://cdn.sqhk.co/weteroliwo/ig4hbgh/ritusaduvidaral.pdfIn PDF document text
    • https://cdn.sqhk.co/nivurerazusa/8hbJwhS/poster_on_save_water_save_earth_with_slogan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vorokam.rf.gd/what_are_the_5_types_of_environmental_stress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85fee137-313e-4299-9a3f-256f4b5af782/weber_recipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5189f557-11c5-42ec-a200-2cbf338c4fa3/lista_de_cualidades_de_una_persona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9cbb1fd-9811-4340-8509-6395c867fab9/lidogalivolowoliv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74d38061-b25c-427a-864b-d8582e66cfda/how_do_you_prove_your_disabled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e749dde7-d76c-47d7-8e17-068f68717812/woxodejekoba.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/english_grammar_book_class_9_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/direct_and_reported_speech.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/assistant_store_manager_resume.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5C 5376 bytes
SHA-256: 2ee1ca088e994483fe4c5ceb0999f46172ff2248e8660d1810bc9d96834b6e67
font_01_sfnt_off00010189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10189 11028 bytes
SHA-256: be53b18c8d19c140b8b2896dbad5a6196a1826f8f6f9fbe4f2a1e1d245f49d17
font_02_sfnt_off0001275c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275C 16060 bytes
SHA-256: 2d958bd008b8db5b33092f112e99c856adbcc0a100e950d14ff814b784be6357