Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea0dd7972ab5032…

MALICIOUS

PDF

87.5 KB Created: 2021-03-20 18:11:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 42eb5fadd10de8cf9d8362e3de6f6150 SHA-1: ff537cd68e5b8f316243058551d3b9f92c0a27bd SHA-256: aea0dd7972ab5032281f08393724338a846303c2cfed4dd946aef4eae1c2242c
126 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains a large number of embedded URLs, many pointing to disposable or unknown-reputation domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains strings related to PDF printing and application versions, which may be part of a lure or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/award?keyword=autocad+has+a+native+pdf+printer PDF link annotation
    • http://xabofawowu.22web.org/artificial_intelligence_review.pdfIn PDF document text
    • http://mazovun.iblogger.org/chrisye_dekade_album.pdfIn PDF document text
    • http://wesadozazizubus.iblogger.org/python_dictionary_keys_length.pdfIn PDF document text
    • http://zitirisiz.mywebcommunity.org/kundalini_yoga_chakras.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/accounting_principles_11th_edition_solution_manual.pdfIn PDF document text
    • http://pitetivedu.iblogger.org/warrior_cats_website_games.pdfIn PDF document text
    • http://ferafukapawap.scienceontheweb.net/dcs_world_f_15_autopilot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bubokamuwejutul.rf.gd/importance_of_technical_education_essay_100_to_120_words.pdfIn PDF document text
    • http://josatagosovux.rf.gd/pajisi.pdfIn PDF document text
    • http://zorumiwopa.rf.gd/eva_luna_isabel_allende_descargar.pdfIn PDF document text
    • http://fukutinupamebo.rf.gd/36054237223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e537d9f-76d2-4416-abb3-b4de840b3633/who_was_anne_rice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/917efe83-8aef-4370-b1e3-49ff4921bb23/lifujodatabosozazazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d95d81-8054-4e3a-92b4-63033d117441/58810593544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bcbe9cd-25f6-4a5e-9041-67ed610a0a94/79199353021.pdfIn PDF document text
    • http://xaxamudujuve.epizy.com/how_to_use_introverted_intuition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3be228-47b0-4b05-b2ea-64e265e7407b/8815322699.pdfIn PDF document text
    • http://lebusepuwiri.atwebpages.com/gentron_10000_watt_generator_specs.pdfIn PDF document text
    • http://xuxivobanirug.epizy.com/65881575584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebff3430-daba-47a3-a61b-9fbbb71bca3c/solving_absolute_value_equations_and_inequalities_worksheet_algebra_2.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/xiduxow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c5afe3-9ad2-4670-8282-bdb101a0b317/interview_questions_and_answers_for_manager_round.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35076ef-f902-4759-8eaa-6f67bc7f335f/78295992928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ea9544-37ca-4c97-be8b-2a39f7df84cd/diablo_2_cd_key_26_characters_generator.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_off0001194f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194F 5260 bytes
SHA-256: 6bdbc0f9c3a31433917201faf548e2a266e662f6af8d3d85c74b8201fa20d386
font_01_sfnt_off00012b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B39 10732 bytes
SHA-256: d072e6ca8a805ffd742d4634ed1ccaa6a8fedb8fd57267b9b69f1d9df48abff0