Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ee02acbf32b700…

MALICIOUS

PDF

70.9 KB Created: 2021-04-22 21:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d96828443df94df6fbaae476b251aa45 SHA-1: f33cae9e23ab7cd61f0e4eea5a1878ae1631b10f SHA-256: 04ee02acbf32b7005bb3da2583b2b74f1cbe953fa0ba0873af00c7ea279a7bfa
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with `https://xezojetit.ru/strik?utm_term=basic+math+facts` being a primary indicator of a malicious redirect. The document body, though heavily obfuscated, suggests a lure related to 'basic math facts', aligning with common phishing pretexts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/strik?utm_term=basic+math+facts PDF link annotation
    • http://dabukim.mygamesonline.org/libro_degli_spiriti_allan_kardec.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/fisasexoti.pdfIn PDF document text
    • http://zasigugela.iblogger.org/61700113205.pdfIn PDF document text
    • http://volelovapudexif.scienceontheweb.net/acidosis_respiratoria_tratamiento.pdfIn PDF document text
    • http://godomun.iblogger.org/26820703766.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/mefatoliwibudufu.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/577a600f-eb54-4f6e-8053-c289f55b6e64/john_deere_190c_deck_parts.pdfIn PDF document text
    • http://zovixis.epizy.com/28638266368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/421483fc-4e0c-4805-a140-c922765db897/shoei_neotec_2_helmet_sale.pdfIn PDF document text
    • http://kusefiselarezex.epizy.com/sunobegodomakimizun.pdfIn PDF document text
    • http://sipofepusadofas.rf.gd/gemifawemuj.pdfIn PDF document text
    • http://kobisatavapuw.epizy.com/mechanics_of_materials_3rd_edition_craig_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f1042d-9103-48b5-8eb1-842656eb96cd/33826200087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be024a9-8861-4af2-a382-eb274cd0d030/15481075423.pdfIn PDF document text
    • http://kafopazam.epizy.com/apptoko_traffic_rider_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/814a98e6-d5dc-4cb8-aab7-11defc1a37a9/gojatavifotufemasupofa.pdfIn PDF document text
    • http://gaditerigasut.rf.gd/52318572546.pdfIn PDF document text
    • http://xifonefoje.epizy.com/64394330783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0dc488d-f4ad-4aa0-a4d8-0ccc513ec5fe/cosco_scenera_next_installation_forward_facing.pdfIn PDF document text
    • http://dusiwesidixe.epizy.com/favewoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c09884-e672-45b2-b1bd-8a71d41eaf8d/12928467246.pdfIn PDF document text
    • http://neloronubu.epizy.com/california_family_law_for_paralegals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f72fe4-0b56-4b45-9b65-dbbb988aab02/asus_x99_deluxe_cpu_support_list.pdfIn PDF document text
    • http://xajeladegafu.epizy.com/23336922453.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_off0000d980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD980 5044 bytes
SHA-256: c9ea37d5c7426225b9759b937413d3779e54a5f2f5ffc7c0d01d1ec814ec3e8c
font_01_sfnt_off0000ea8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8A 10544 bytes
SHA-256: 6268e4d65970b0d83b9a89a7047af1806f1aee44e8be7c13685a3208030cbfb3

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