Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b735459a71fc2d…

MALICIOUS

PDF

78.9 KB Created: 2021-02-20 03:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 21ac14bf0b8a4db261ca2ab2a9a5d272 SHA-1: a35eca32e918bcf972aaf3c0c9e4c541fd037437 SHA-256: 60b735459a71fc2d4eb13ec5a860ecbad700b7aa40ba13efe6c195172238260d
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm hosted on disposable domains, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to a site that exploits them or serves further malware. No scripts were extracted, but the PDF structure and embedded URLs are sufficient to infer a malicious redirection pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/strik?utm_term=50cc+dirt+bike+for+sale+used PDF link annotation
    • http://mastericy-chistoty.ru/70750458153pn4qv.pdfIn PDF document text
    • http://maddot.space/74116540337qprxh.pdfIn PDF document text
    • http://springwin.space/kylo_nifi_templatesysjbs.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/gba_emulator_apk_ios40tpi.pdfIn PDF document text
    • http://rubka.space/what_is_logic_gates_in_electronicsw9tc6.pdfIn PDF document text
    • http://wordwild-store.com/790103741661xxko.pdfIn PDF document text
    • http://reduslim-official.website/corel_wordperfect_x9_manualx6pjz.pdfIn PDF document text
    • http://kprovk.xyz/93607918407t5t9x.pdfIn PDF document text
    • http://hihikane.space/aconitum_napellus_30ch_como_tomarjz58b.pdfIn PDF document text
    • http://whitetwo.space/sustaining_the_earthft24f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sobikunukozi.rf.gd/nirokifupulolilo.pdfIn PDF document text
    • http://sajavisazoz.epizy.com/46172278492.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/89161918665.pdfIn PDF document text
    • http://dabesajunelazul.rf.gd/mejenafebanal.pdfIn PDF document text
    • http://wewozewifepono.epizy.com/vamuwabafobopolugagamasiz.pdfIn PDF document text
    • http://jikokajogov.rf.gd/janapada_kannada_movie_songs_free.pdfIn PDF document text
    • http://ribowiga.epizy.com/9179209918.pdfIn PDF document text
    • http://nisebot.epizy.com/bavogujas.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/35575928228.pdfIn PDF document text
    • http://wejelinemadagep.rf.gd/gozekozokinujofunek.pdfIn PDF document text
    • http://denowejifonur.epizy.com/30823351465.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/41711687129.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/cassava_flour_processing_business_plan.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_off0000f76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76C 5392 bytes
SHA-256: d99169c24ad96939152d0f667c8127edf2901332abc28b566abcfb399846f620
font_01_sfnt_off000109d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D1 10632 bytes
SHA-256: bbf0dac98a0fdf3b9683b3f65527212f1904b17d4da9a0878fd4c57bff39bec8

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