Malicious PDF — malware analysis report

Static analysis result for SHA-256 f090e63aa08543ca…

MALICIOUS

PDF

84.7 KB Created: 2021-04-07 22:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 944ea9fba1ab639ef4428042c20c157b SHA-1: a8d7b9fcee359fff77d53602ac3df7533eaac00b SHA-256: f090e63aa08543ca01d9e9e300ea39129fd6cfa3ebd6dc679a59e0a106d7e463
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL (`https://resalured.ru/strik?utm_term=john+deere+400+60+inch+mower+deck+parts+diagram`) being flagged as suspicious. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` indicates the PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. ClamAV detection further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=john+deere+400+60+inch+mower+deck+parts+diagram PDF link annotation
    • http://tb-films.ru/wakokajanudovetufososiqglog.pdfIn PDF document text
    • http://gulenapirexapo.iblogger.org/basic_computer_tutorial_for_beginners_windows_10.pdfIn PDF document text
    • http://virujurarajilef.getenjoyment.net/bullous_pemphigoid.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/bhagavad_gita_the_song_of_god_swami_prabhavananda.pdfIn PDF document text
    • http://show-visitor.xyz/problemas_con_los_intestinos_sintomasygoeu.pdfIn PDF document text
    • http://wafixevewitope.mypressonline.com/srimad_bhagavad_gita_in_gujarati_download.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/19236663344.pdfIn PDF document text
    • http://bipowilago.mywebcommunity.org/vepizadomilanoxiwowobawu.pdfIn PDF document text
    • http://datab.vip/how_to_get_a_probability_distribution_in_minitabjewcf.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/fases_del_proceso_metodolgico_de_la_investigacin_cuantitativa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://revodez.myartsonline.com/caida_de_mexico_tenochtitlan.pdfIn PDF document text
    • http://vabepevid.epizy.com/xuveva.pdfIn PDF document text
    • http://bonizeza.epizy.com/30517113416.pdfIn PDF document text
    • http://pigafutuvip.rf.gd/costco_photo_book_printing_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/52740358957.pdfIn PDF document text
    • http://jabaxuzadowepep.rf.gd/tesco_leather_cleaner_data_sheet.pdfIn PDF document text
    • http://woxutonugosafer.epizy.com/wamowupivow.pdfIn PDF document text
    • http://pogosib.epizy.com/white_christmas_music.pdfIn PDF document text
    • http://tejusadesivuti.epizy.com/sql_expression_editor_crystal_reports.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/how_to_be_a_better_husband_book.pdfIn PDF document text
    • http://wutebanik.epizy.com/catabolismo_de_lipidos.pdfIn PDF document text
    • http://worurekebisur.rf.gd/48554778648.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/latest_yahoo_mail_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/community_acquired_pneumonia_guidelines_canada.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_off00010837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10837 5984 bytes
SHA-256: fc6cbfa995f9ac07c88457437a54261311beca7fb11b1847850bbd5640fae4bc
font_01_sfnt_off00011c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C81 11952 bytes
SHA-256: 1e8a1625e93aca443653d6eb8efe21a86a2f097735227ed7fd4f0529c3788080