Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da4c549e9d3e11e…

MALICIOUS

PDF

71.6 KB Created: 2021-09-19 10:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 391b310cc8599d1888e77e459a4499b9 SHA-1: 07b0d2eeb13516cf25dcf0a2dcaed799a59c07b7 SHA-256: 0da4c549e9d3e11e7205276b5ba4629e040bc43b6105b2dfcb732d792039e840
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://krisoc.ru/uplcv?utm_term=anthem+ayn+rand+pdf PDF link annotation
    • https://www.terraton.com.my/ckfinder/userfiles/files/42399927128.pdfIn PDF document text
    • https://ist-lb1.istanajp.com/contents/files/durovufafo.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/05/33463146533.pdfIn PDF document text
    • http://guitarenko.fr/img/files/xuwufedomitorupivupu.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/1682e4121ee7b8fc767272ffc177fbb9/vurerimotizejinaru.pdfIn PDF document text
    • http://warwick-ems.org/userfiles/file/69676739227.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/2s6o02rjtkbb90s64mhjlmmbs2/37056397130.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/30365405786.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/14401793272.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/buvatamopawe.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/xorulazanexonatesot.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ced10631ef---98392171986.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/porotabovixowogatigip.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/053691da8e80c1cb7648ec4024ed5a9b/wasesosaramoruge.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/53146007338.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/43323843327.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/lalitobuxizon.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/rimiwes.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/58796902711.pdfIn PDF document text
    • https://robertbah.si/files/file/digufunerutevoseko.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/20219181214366073.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/94234044490.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/dodofivaje.pdfIn PDF document text
    • http://fractinvest.com/uploads/file/gadivusorupifemiw.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/disujakitufigur.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/jutofasepikafixotesoj.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA22 10432 bytes
SHA-256: aaf45a2e6e58855cbf085f764163185b440ee1c9720f2251ede9bdc1152fa7e7
font_01_sfnt_off0000d18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18F 15676 bytes
SHA-256: c9c63f2bd839ce71b8dbc953ab5dae92c6994f0d3915584a706118e96721afed
font_02_sfnt_off0000f8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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