Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cec13a4d8250ac…

MALICIOUS

PDF

82.0 KB Created: 2021-05-04 05:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9f7bf82e9af9ee4246c6431418df554f SHA-1: 2db9f2c3c5d8343629f20e1a720b25b82775821a SHA-256: 08cec13a4d8250aca297ba92e81c3e06393258017402e8f8eb4bd1f035ff3e55
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing or malware distribution point. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a malicious intent to obscure the true destination or host multiple malicious documents. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=what+numbers+mean+spiritually PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379733/normal_60113de294ac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_6024afbe360f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488130/normal_603246bce9965.pdfIn PDF document text
    • http://bebosebe.66ghz.com/archimedes_information_in_marathi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477369/normal_603e8ccabaa6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420431/normal_60315d2a77f90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dujawupiraxep.rf.gd/29591103322.pdfIn PDF document text
    • http://nivufebolira.epizy.com/budismo_libros_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/fundamentals_of_economics_mcqs.pdfIn PDF document text
    • https://c93ae04b-3d95-4128-ac62-0503c91a26e1.filesusr.com/ugd/002f5e_4698b9fe81a34d04bf2c7e90d679c6cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/free_android_monitoring_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/gujibokemovalakonamed.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/zebaparobufuwidotezixas.pdfIn PDF document text
    • http://mosokiwilag.rf.gd/vuxotebitinaxunikuroluvas.pdfIn PDF document text
    • http://tatefubuzu.rf.gd/xekatufowewo.pdfIn PDF document text
    • http://bopamebedozupux.epizy.com/sison.pdfIn PDF document text
    • http://pebujenutifovo.rf.gd/nigiwuzuvejuxonuwijemona.pdfIn PDF document text
    • http://nofaramubibuv.epizy.com/tazevupudetev.pdfIn PDF document text
    • http://varidigodi.epizy.com/personajes_principales_de_la_obra_metamorfosis_de_franz_kafka.pdfIn PDF document text
    • http://lomuripejo.epizy.com/dolulurimoxavixalu.pdfIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_d259fc11758f40e2ba1cf4ef89f7315d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liguwubore/rudram_namakam_chamakam_telugu_audio.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_off000101b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B5 5312 bytes
SHA-256: 66a81be3489b0c1a1ce58e9fe8a04f019ff508a445715c2e00be64bdf2f062cb
font_01_sfnt_off000113a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A4 11176 bytes
SHA-256: ec57c4a7fbf74a7efdd8f548bc4ef42d4577eac00d1333b66b7759aa0ec4a13d

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