Malicious PDF — malware analysis report

Static analysis result for SHA-256 8755a88628bd81b5…

MALICIOUS

PDF

77.2 KB Created: 2021-03-16 11:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5226cd6a6546603b4824b8e36a1744eb SHA-1: c13348c379e125a6643a97e4c49ae3f140a8d983 SHA-256: 8755a88628bd81b55e2c88dc294a65c0cf2b1c9c4981f6ffe62188a434c749f5
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with one prominent URL pointing to 'xezojetit.ru', a domain associated with phishing or malware distribution. The PDF's structure and content suggest it is designed to trick users into visiting this malicious link, likely as part of a phishing campaign or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=emoji+quiz+answers+level+2 PDF link annotation
    • https://cdn.sqhk.co/duromivap/Yjhidih/hidden_city_hidden_object_adventure_wikipedia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484818/normal_5feb4de3c52b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414169/normal_6042e6b1f3d42.pdfIn PDF document text
    • https://cdn.sqhk.co/lewonuvaxu/ibMTggf/balasepetak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_600a45d3af38b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490256/normal_604d1955af30d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497368/normal_5fdc0ae8d7026.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/Yx1jajd/porazukizudolipupivaxifit.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/3dbbdefc-e563-4f10-8d86-605081463766/how_many_different_species_of_praying_mantis_are_there.pdfIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_9ab3b43d3f2540a58d639f167eb9d2b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakusineba/fisco_agenda_2019_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/18500056190.pdfIn PDF document text
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_52cb28846f5a4bb9be79c2bab434fb1c.pdf?index=trueIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_fb3d04034e2f484a990e5a40a21c067f.pdf?index=trueIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_63fb0b26b360436ea21508e252aba5ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/davinci_resolve_free_title_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43384ff-7403-48cd-a3be-82de671c587c/fyi_for_your_improvement_a_guide_for_development_and_coaching.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/39531181172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd36330b-18e7-4ca2-aea3-3b42b9eaedaf/fipixemavibumojuvimo.pdfIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_356c87e47d5d4d53b9667cf277678897.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/pukigaloludi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2524bb2-b7b3-4ef9-aa32-9b784b1dcf8a/how_long_should_i_study_for_the_ace_personal_trainer_exam.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_off0000f0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 5324 bytes
SHA-256: 5b6248ad53d255292340396c5574035336fbe0798be4a497a09d4ef58021182b
font_01_sfnt_off000102cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CD 10804 bytes
SHA-256: b1a770b187c0f4477ad82bef7f04299cfdb48d83e170fc391572ff565ed01688