Malicious PDF — malware analysis report

Static analysis result for SHA-256 362c8688c24d9c44…

MALICIOUS

PDF

81.5 KB Created: 2021-03-15 22:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fb4e347df6c4dde9f55791907199defa SHA-1: 22d9874783b65f1229b3bc3978effc44355d92ff SHA-256: 362c8688c24d9c4485f65eb558add10240570ad09f34d9e0948de032b4a801e2
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable hosting domains, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL heuristics point towards a malicious document designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=hunger+games+mockingjay+part+1+plot+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391896/normal_604808e0e2fa9.pdfIn PDF document text
    • http://trychambre.xyz/buxowomovimofnw6k3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_6033f5afcbc79.pdfIn PDF document text
    • http://contentmedialiteracy.com/luvezebat2wgo.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/tevikabegebaxuvubobase.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/romeo_and_juliet_act_2_vocabulary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_604499de7e7e0.pdfIn PDF document text
    • http://fazupefejivujuf.iblogger.org/boxuvemakozetew.pdfIn PDF document text
    • http://wajofima.mywebcommunity.org/dutimade.pdfIn PDF document text
    • http://nunegotopexipo.iblogger.org/7221944875.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/zamiwinipunoxov.pdfIn PDF document text
    • http://kushtanash.ru/basic_pharmacology_for_nurses_17th_editionh5wzz.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/the_monkey_king_3_hindi_download_kaise_kare.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://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_d7d4f82ac34f433ea77919542ae5678a.pdf?index=trueIn PDF document text
    • https://16dc6c2a-32e3-4a69-9eea-5b59d93654f8.filesusr.com/ugd/176c29_92880b5179064443b7992090101098cb.pdf?index=trueIn PDF document text
    • http://tibobabinenan.epizy.com/majexizaxilozitofudep.pdfIn PDF document text
    • http://xinudigiwuwa.epizy.com/honda_civic_si_2018_maintenance_schedule.pdfIn PDF document text
    • http://jogilajixetevub.rf.gd/7593193276.pdfIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_2334d0ea8b804e4985606d81c8810173.pdf?index=trueIn PDF document text
    • http://dukojalili.rf.gd/2368856645.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_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 5388 bytes
SHA-256: b0f091546a52287b526b4a0d8452bc2a3b4c5f217c81041b93037d47323a23c5
font_01_sfnt_off00010376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10376 10788 bytes
SHA-256: 95275ef3e9fd7d0911b34017ce5ed192569382960e19935eb36b47337ba61a00
font_02_sfnt_off0001286d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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