Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea289b7e613e85b…

MALICIOUS

PDF

84.3 KB Created: 2021-04-20 12:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c955680f8ff9179f40c29bf64762c0af SHA-1: d8d74a711613cbaf66e1d33fa682c39930564418 SHA-256: 0ea289b7e613e85b638197b55012c08c5c6b93991e76214574b05e0cdffd1c6b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to printing a calendar, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/strik?utm_term=how+to+print+a+january+2020+calendar PDF link annotation
    • http://sevotapapi.22web.org/antra_singh_priyanka_photo.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/jCYhggg/1533023485.pdfIn PDF document text
    • https://cdn.sqhk.co/sozodumupof/kiahgZr/43411121899.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/iP2geii/391_write_in_words.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/rpp_aritmatika_sosial_kurikulum_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sikibeve/gicnRjd/i_m_gonna_learn_spanish_in_spanish.pdfIn PDF document text
    • http://lukosewikaj.22web.org/65701170991.pdfIn PDF document text
    • http://foselosen.sportsontheweb.net/muwadiwovenide.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/bangalore_mirror_epaper_today.pdfIn PDF document text
    • http://kijewumiw.iblogger.org/cyberghost_6_premium_apk.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/dinike.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484623/normal_5fde75b76e041.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/hiYlidl/vowomebezukepijijafexuze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_5fdc1bac35a37.pdfIn PDF document text
    • http://samiter.22web.org/toilet_fixtures_cad_blocks_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/cAYFgg5/47448614199.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/hjP3uid/mediaf_re_download_minecraft_maps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_603a759d55441.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
    • http://zifasodokid.epizy.com/86937270350.pdfIn PDF document text
    • http://lelirovosas.epizy.com/asana_templates_ideas.pdfIn PDF document text
    • http://xutarefes.epizy.com/42440735749.pdfIn PDF document text
    • http://korofituzuxigu.onlinewebshop.net/16936527882.pdfIn PDF document text
    • http://buxifofokuder.rf.gd/california_citation_style_manual.pdfIn PDF document text
    • http://lifedebidabu.rf.gd/radius_of_convergence_of_maclaurin_series_calculator.pdfIn PDF document text
    • http://fofilelajisemap.rf.gd/10481400292.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_off0000fe45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE45 5276 bytes
SHA-256: 8701cb2714468da39899c5ab84410f403862180201af1cd613a64c14a4a7f0c7
font_01_sfnt_off0001104f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104F 10712 bytes
SHA-256: 1d58fdfc99f5fcf34f0f6636abe6fcbe0ccb425488adf9b37f79a3b9bbd96db7
font_02_sfnt_off000134f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c