Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f8248756cff572d…

MALICIOUS

PDF

78.3 KB Created: 2021-02-16 16:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: caad92ca3783e759539cd718b0aada4a SHA-1: e015b26c9f72d592a7e5849f6e8cdce0fcca749f SHA-256: 5f8248756cff572d7c69dad1da25e36ce5082a1fa5a6e379b95d013f9740bf53
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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://baarspo.ru/strik?utm_term=software+process+flow+diagram+visio PDF link annotation
    • http://rerulekoba.66ghz.com/milububimekar.pdfIn PDF document text
    • http://javebamugizal.66ghz.com/durga_mata_aarti_video.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/fXhaDif/used_car_calculator_with_tax.pdfIn PDF document text
    • http://bidumowot.22web.org/72986301130.pdfIn PDF document text
    • https://cdn.sqhk.co/buruvalufe/hhhimje/tap_medical_procedure.pdfIn PDF document text
    • http://fokikizuxijem.iblogger.org/harrogate_borough_council_recycling_guide.pdfIn PDF document text
    • http://lisifakus.66ghz.com/pifarudedolotir.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/qvgc6hi/fojojipojuzefenatufuvifu.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/hJKrhd0/nojupori.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/jeeXza0/learn_c_free.pdfIn PDF document text
    • http://lorebip.22web.org/mckinsey_report_2019.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/fewunadupop/trueman_elementary_biology_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/wrecking_ball_christina_grimmie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/kemagesewadalufoduz.pdfIn PDF document text
    • http://wozaxanakix.epizy.com/89511982425.pdfIn PDF document text
    • http://vonubopoz.rf.gd/google_documents_invoice_template.pdfIn PDF document text
    • http://japusorusepex.rf.gd/85207883555.pdfIn PDF document text
    • http://galefawanakujum.rf.gd/ectomorph_weight_training_guide.pdfIn PDF document text
    • http://tudibakigar.epizy.com/2745443416.pdfIn PDF document text
    • http://kopuperoki.epizy.com/19765940813.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_off0000f227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF227 5732 bytes
SHA-256: 0d3fdbcb65df3d1ea8133fd6bfa844ae5cd9f6226dee7b925a71e2f6c7143def
font_01_sfnt_off000105ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AD 11172 bytes
SHA-256: 333c055288262c8853032019358f23a1c01d676ab83576b362c89ea368c4190c

Open this report in the interactive analyzer, or submit your own file for analysis.