Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba583f0081ea6189…

MALICIOUS

PDF

67.7 KB Created: 2021-02-17 06:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: edf1db97ef2aa588906e82bec637de44 SHA-1: 7fb6d6fb7f839731a6c91ce73bc9616b109e9ae8 SHA-256: ba583f0081ea618945461e668f65bfb70e0e981587af2e6b5284b69bfae68c73
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=liftmaster+3280+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450353/normal_5fda2db367c02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478378/normal_6007ba3b94819.pdfIn PDF document text
    • https://mefutugotipefij.weebly.com/uploads/1/3/5/3/135304762/b4815f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502906/normal_5ffba665e4e89.pdfIn PDF document text
    • https://valetapos.weebly.com/uploads/1/3/4/2/134265584/woliludis-tibatexorufufev-vejuruxami-xeretadovaziv.pdfIn PDF document text
    • http://watomidipokaki.22web.org/7968885531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391013/normal_5feb0df9d2519.pdfIn PDF document text
    • https://cdn.sqhk.co/gevopobi/gjwUIus/cooking_ice_cream.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/kjehaia/89596936656.pdfIn PDF document text
    • https://viduxetejogat.weebly.com/uploads/1/3/4/6/134600114/nuwivadajirisi_jekoxarutib_nitewitanu.pdfIn PDF document text
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/gibigutilav_piveludo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/88505298563.pdfIn PDF document text
    • http://xawabaxazulaga.epizy.com/java_runtime_1._7_64_bit.pdfIn PDF document text
    • http://nivedopiganezo.epizy.com/composition_of_functions_worksheets.pdfIn PDF document text
    • http://pakatikik.epizy.com/35275887307.pdfIn PDF document text
    • http://pamakejexo.epizy.com/manualidades_con_objetos_reciclados_faciles.pdfIn PDF document text
    • http://kunivoji.epizy.com/olx._uz_apk.pdfIn PDF document text
    • http://topeleseluvon.rf.gd/pioneer_sx_780_no_sound.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_off0000cd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD15 5488 bytes
SHA-256: 0b5dfe47119498d5ee69f54bf172c5ddf76028df06052ef62bcd564565ede78b
font_01_sfnt_off0000dfa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA1 10156 bytes
SHA-256: 53f780f960833316018aa25f9569c8d4494a3bc27de906722d1ee988b774d91d

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