Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c34ce4b4743b7a…

MALICIOUS

PDF

77.7 KB Created: 2021-03-29 07:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 60eff88cab8f2ec011bd6a6c75aebf97 SHA-1: 57b1c9fc1812dca43e5123077bd577f2ccb2783e SHA-256: f3c34ce4b4743b7aa05313cd9845c46f614b017ae378a4aa168ac6931b12b49e
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were extracted, the presence of a malicious URL and the nature of the PDF heuristics suggest an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://gimoguvi.ru/award?keyword=brene+brown+dare+to+lead+workbook+pdf PDF link annotation
    • https://rirudelibuwa.weebly.com/uploads/1/3/1/6/131606594/5830198.pdfIn PDF document text
    • https://cdn.sqhk.co/lupekute/hjTAhgF/15960376488.pdfIn PDF document text
    • https://tolejavufagus.weebly.com/uploads/1/3/1/4/131437822/xemisinoxupaxu.pdfIn PDF document text
    • http://fuxejezosajusop.22web.org/carson_dellosa_worksheets.pdfIn PDF document text
    • http://niruteluw.22web.org/september_2020_printable_calendar.pdfIn PDF document text
    • https://boxorefo.weebly.com/uploads/1/3/0/9/130969922/vakobatofaxus.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/hjgj4ji/83646140432.pdfIn PDF document text
    • https://cdn.sqhk.co/fowoleleda/ijuGLJc/tibaz.pdfIn PDF document text
    • http://dogorove.22web.org/fourier_transform_infrared_spectroscopy_theory.pdfIn PDF document text
    • http://tefigizuvixan.22web.org/rujetetimemiwo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/de19b8ed-45d0-4a43-83cf-094d9ac9b601/18214199556.pdfIn PDF document text
    • http://tuzotulerijenej.rf.gd/ecclesiastical_latin_pronunciation_guide.pdfIn PDF document text
    • http://godubaxedija.rf.gd/how_to_install_zotero_in_ms_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5c55ab-8cd8-40e8-8109-39ec38a119d3/rain_dial_rd-600_ext_manual.pdfIn PDF document text
    • http://dutagewenurodub.epizy.com/sony_dsc-s85_memory_stick.pdfIn PDF document text
    • http://pimogajen.epizy.com/what_is_the_k_value_in_chemistry.pdfIn PDF document text
    • http://karusesaze.epizy.com/51428556275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b63e253b-678d-457d-b851-59e2ed8d7dba/modos_de_produccion_capitalista_socialista_cooperativo_y_de_economia_mixta.pdfIn PDF document text
    • http://xerekexaxo.epizy.com/how_do_i_connect_my_hp_officejet_pro_8600_to_wireless_network.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d14fea8-6a0a-4932-8494-c939b4208f27/will_there_be_a_5th_eragon_book.pdfIn PDF document text
    • http://mekidena.epizy.com/psc_exam_calendar_october_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7b15a4-157a-44b6-95e4-9e6a6e13ce28/bmw_navigator_vi_mount_cradle.pdfIn PDF document text
    • http://koderozuxiritoj.rf.gd/why_is_my_alcatel_not_charging.pdfIn PDF document text
    • http://nizalag.rf.gd/51387982978.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F1 4944 bytes
SHA-256: 539480b109b40fce6cf9a79a4ad45420815af3a2abdfc472453761b1fac7c76e
font_01_sfnt_off0000f3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DB 11412 bytes
SHA-256: 4d246e9f439fc4ad268d3ca923bf3bea0f7027e29f94af9311699cfbc2eaa57c
font_02_sfnt_off00011a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A89 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34