Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4af674957f6ad69…

MALICIOUS

PDF

80.1 KB Created: 2021-04-04 21:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 516623ad5feb3705dd83dbc2452b2a3c SHA-1: 99fb4c70f3df760be1eadbee2735d66acc349f2f SHA-256: a4af674957f6ad69681226c315bac200409bf158621cd8f93ba51201300d2fe5
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('golowaki.ru') that is likely used for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is part of a network of links on disposable hosting, reinforcing the malicious nature.

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://golowaki.ru/strik?utm_term=understanding+by+design+lesson+plan PDF link annotation
    • http://giboxibefelas.22web.org/21776653796.pdfIn PDF document text
    • https://mulunumidivopiz.weebly.com/uploads/1/3/5/3/135393794/silodusunegeg.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/bXEhfha/19987318627.pdfIn PDF document text
    • http://form-copyrightservices.com/bilijipilipikau53tx.pdfIn PDF document text
    • http://fasajesova.22web.org/ximiwifopezobavewupuz.pdfIn PDF document text
    • https://rabifitirigi.weebly.com/uploads/1/3/0/7/130739094/2c07fb04187486.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/fyjdihO/tyler_perry_sistas_tv_show_bet.pdfIn PDF document text
    • https://cdn.sqhk.co/xizowabik/gfpLhf8/bsek_9th_result_2019_with_marksheet.pdfIn PDF document text
    • http://chtotakoevuxom.biz/what_is_the_full_version_of_the_serenity_prayertiw83.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/Kqwieki/find_my_phone_by_number.pdfIn PDF document text
    • https://mabobuloxulekev.weebly.com/uploads/1/3/4/6/134692970/7310733.pdfIn PDF document text
    • https://kibodoru.weebly.com/uploads/1/3/2/6/132695707/4701285.pdfIn PDF document text
    • https://cdn.sqhk.co/sikibeve/shgqBlc/michelin_police_pursuit_tires.pdfIn PDF document text
    • https://wivujugojuz.weebly.com/uploads/1/3/4/8/134883460/zubaxotalu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sukidagijonola.rf.gd/24316934509.pdfIn PDF document text
    • http://rusakarazixano.epizy.com/54374691281.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/book_report_worksheets_third_grade.pdfIn PDF document text
    • http://sonazorapabame.epizy.com/aprendizajes_clave_primer_grado_primaria_matematicas.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/austenite_transformation_diagram.pdfIn PDF document text
    • http://newabef.rf.gd/lomog.pdfIn PDF document text
    • http://xazasanedaned.epizy.com/6636658902.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/bareminerals_barepro_performance_wear_powder_foundation_shades.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_off0000fc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2A 5360 bytes
SHA-256: e586de1a91da62fd7757b17413cbd5b367ca80c4464e7ac3fd525dbee586f6ac
font_01_sfnt_off00010e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E73 10812 bytes
SHA-256: 33e31888c6651b6f87a81e6d2b6d6aacc026963e50b2c017b06c54efdb4fbdfc

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