Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eeba7e0b92b052f…

MALICIOUS

PDF

78.8 KB Created: 2021-03-08 13:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 410b67d32f0b091b0c099ffaa3b3a23c SHA-1: 2b2f6c855e13e004a0bd00c75dc3d36529ce7ea0 SHA-256: 5eeba7e0b92b052f4ccf7f460c76015b8bf0197e89c950b3f4f35e3742b8bdd1
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO abuse tactic. One embedded URI points to 'kuzutuzo.ru', which is likely part of the malicious infrastructure. The document body, though heavily obfuscated, appears to be related to educational content, a common lure for phishing documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/wb?keyword=volume%20of%20cylinders%20and%20cones%20worksheet%20pdf PDF link annotation
    • https://faxipanonuk.weebly.com/uploads/1/3/4/3/134352952/541465.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465396/normal_5ffed14e5dd04.pdfIn PDF document text
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/repaxosujuk.pdfIn PDF document text
    • https://mokizafot.weebly.com/uploads/1/3/5/3/135347773/wipovupanawaleturur.pdfIn PDF document text
    • https://lipopujowojirew.weebly.com/uploads/1/3/1/4/131408954/pidomoxanuxobifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_600c445e97b44.pdfIn PDF document text
    • https://bipufufutugudov.weebly.com/uploads/1/3/1/1/131164095/duwibid_woxawavo_dovokar_sebideb.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/LCjfgeJ/duvizegimogirevedozese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480389/normal_60446915225b1.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/frMKxRQ/anime_war_ita_wikipedia.pdfIn PDF document text
    • https://tagopebarezixog.weebly.com/uploads/1/3/1/6/131607889/dutizudadev.pdfIn PDF document text
    • https://wavikifetin.weebly.com/uploads/1/3/4/9/134901048/lerenafuvitig-doxakawamogag-bebelopugurek.pdfIn PDF document text
    • https://ligefunodimab.weebly.com/uploads/1/3/1/3/131398292/1001608.pdfIn PDF document text
    • https://gixinizolovuz.weebly.com/uploads/1/3/5/3/135348456/situxavebubevovub.pdfIn PDF document text
    • https://cdn.sqhk.co/gotoruzud/Zhhc9ib/2nd_grade_math_word_problems_khan_academy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408463/normal_603a1b5d74f62.pdfIn PDF document text
    • https://modotetizifoxi.weebly.com/uploads/1/3/1/6/131637555/xuvusipugofasowigufo.pdfIn PDF document text
    • https://cdn.sqhk.co/tuturuno/Ghe2Iib/40141679110.pdfIn PDF document text
    • https://dizufarul.weebly.com/uploads/1/3/1/3/131379939/dojozi.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/ictimhe/sonic_4_episode_2_apk_unlocked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421333/normal_5ffe012c226c6.pdfIn PDF document text
    • https://soletobapikod.weebly.com/uploads/1/3/4/5/134582957/7fd988e635.pdfIn PDF document text
    • https://karesaxu.weebly.com/uploads/1/3/5/3/135392924/golalireduribo-lowojeruvus.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://s3.amazonaws.com/murudute/bimetikilogos.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/transformers_bumblebee_fusca_brinquedo.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/37356354798.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/lexique_informatique_franais_anglais.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_off0000e6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 5500 bytes
SHA-256: b7b6c98b35b0afae8b9c4517c66242c947e737fd70a3936a27b62679387e5f02
font_01_sfnt_off0000f963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF963 11120 bytes
SHA-256: cf0740b6cf7aa71c638e803b9e9762691fd5a565243af2c19c07367615bdf6a9
font_02_sfnt_off00011f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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