Malicious PDF — malware analysis report

Static analysis result for SHA-256 0147443a1eea4e2d…

MALICIOUS

PDF

75.5 KB Created: 2021-03-13 13:35:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a6854956320ce834fff766ab3d9e9578 SHA-1: 149265a1313cf482082460075725a6a41257fae5 SHA-256: 0147443a1eea4e2d6987aa464a3bde229fcabe33d012e9e6ae3968e484200c9d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple embedded URLs, with a primary suspicious URL pointing to 'baarspo.ru'. Heuristics indicate the PDF is a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/award?keyword=big+bang+theory+article+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425010/normal_602b65ffd580b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454432/normal_5fc7e8cb38ffb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_5fd3c3d771fb3.pdfIn PDF document text
    • http://mibamixuxonewu.22web.org/piguxirixojedusozudizam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410703/normal_5ff8f8f20b0a4.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/yasin_tahlil_dan_doa_ziarah_kubur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470035/normal_5ffdd9d6a0148.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/vovudelabonupizedudgggi2.pdfIn PDF document text
    • http://italywow.pro/96750753455lfpzk.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/philips_universal_remote_apple_tv.pdfIn PDF document text
    • http://hookup154.space/9507632742427dtb.pdfIn PDF document text
    • http://rubeatyshop.xyz/quadra_fire_contour_pellet_stove_manualgppnx.pdfIn PDF document text
    • http://namabal.scienceontheweb.net/rimowuludas.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/notodavorojutudojijilakuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://natexaz.rf.gd/dewalt_3400_psi_pressure_washer_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b107c75-d4b5-48c6-9806-cf87628ea49d/sony_hdr_cx240_camcorder_review.pdfIn PDF document text
    • http://firiwigisu.atwebpages.com/99951423436.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/96678857535.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/kafirabomale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7973a660-8dda-48bf-93b5-5d04bdaf0132/dixie_chopper_zee_2_54_for_sale.pdfIn PDF document text
    • http://runumap.rf.gd/dokewepokaxobilukobepo.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/launching_soon_template_psd.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_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 5528 bytes
SHA-256: ea09c4ff0aa1ac8c9bfe2cc5840a2a4efbce42a33aa76992d261ec0778c61d00
font_01_sfnt_off0000fe5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5F 10000 bytes
SHA-256: fa052b54a3290f4c27b96ceb52bc9a087318338c9c27a135af650d7452cf2e78

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