Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d3fd12709f6baa…

MALICIOUS

PDF

76.7 KB Created: 2021-04-23 23:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 04fbf14a16748fdc60a65edeeafd214d SHA-1: 046b88d12160b59f5f96fa407c5c47adaf05bc63 SHA-256: 90d3fd12709f6baa0187eb259ce76fe1cd82e49f3faa3138ebc6ffde9b3188d7
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('mezovuduw.ru') that is likely used for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=dewalt+pressure+washer+3400+psi+price PDF link annotation
    • http://edayafar.xyz/cs_dosyas_oluturmap4ict.pdfIn PDF document text
    • http://copyrighthelpptteam.com/que_es_un_autorun_en_computacionug81k.pdfIn PDF document text
    • http://pajopoxofof.iblogger.org/whirlpool_quiet_partner_ii_cycle_time.pdfIn PDF document text
    • http://wiinorama.website/24487213008e3v5a.pdfIn PDF document text
    • http://ruszaimclub.ru/what_to_say_to_a_girl_when_she_gives_you_one_word_answerske78c.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://fishland.store/zaxemeo75gj.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a48fc7e-e63a-46c2-b24c-c4bac82e0e8d/the_road_not_taken_summary_robert_frost.pdfIn PDF document text
    • http://lebekuwawelu.epizy.com/endless_hallelujah_sheet_music.pdfIn PDF document text
    • http://jinesiwi.epizy.com/betusile_mcinga-_uyakhathala_ngam.pdfIn PDF document text
    • http://lavebaku.rf.gd/biosecurity_in_poultry_farm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0ed821-c195-416c-a473-b848ab80fb8c/best_3_ton_floor_jack_harbor_freight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8715730-2e44-41de-ae49-b0ef73917454/29430744352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ab8d0a-5efd-4ebd-8552-7d9647a51628/juxoxavoj.pdfIn PDF document text
    • http://kebafitesulodu.epizy.com/bazopoturasesixodejikoxu.pdfIn PDF document text
    • http://foxojowekalorut.epizy.com/bomag_bw_120_ad_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f6adc5-4c83-4ad7-b6ce-9b327a68383e/71931169182.pdfIn PDF document text
    • http://kesobikifa.epizy.com/16354961324.pdfIn PDF document text
    • http://mokisomalew.rf.gd/business_management_for_dummies_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1236a2fb-5088-4791-81ad-0ce09a72a2b3/5650058129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b93a88-a427-4dda-86d9-d37c1e9817c8/feocofeco2_reducing_agent.pdfIn PDF document text
    • http://judimavazamo.epizy.com/gaguvujusilitukexapigowad.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_off0000ec28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC28 5504 bytes
SHA-256: 508f6dbf96444316c0f13b8183c9933b763d601da8457a64bb7da4053dbbeae5
font_01_sfnt_off0000fef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF8 11140 bytes
SHA-256: 24c978bf55e8633c0cb01c4899a756d27b50ef242c6fcc24afda85abedc20c5f