Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df64dc9027b7a04…

MALICIOUS

PDF

78.1 KB Created: 2021-07-28 05:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ea14ec7684aa53b8ae75f8b3ef5ee9ab SHA-1: 80359e3a4a6a966d3582a47034e969627923aa5c SHA-256: 0df64dc9027b7a048fe861264fe0e30089386ddd38aa319e32093ddb0c889662
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely a phishing or trojan delivery mechanism. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure that aims to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://mevlanaasm.com/resimler/files/20589251201.pdf In PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e062de42d1a---46275629008.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/8kt4v80ivlis9af5i48f7c6h7n/39406011627.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/tmlmhkglq4jjde6houmulu8m11/73188988625.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/xeraduxilemixinefelexeles.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/e42a066ef7e671a8abe426222c439c7b/punusekawo.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/6e1qtm2elhccmgqt5k9962l3sq/ropokugaxugerojenuratis.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/636c2d3242d233640436b43edac0cfff/fozobuto.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe33fb38c7---guxekadip.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/jodugorenakunapizuta.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/76685634848.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/kibumaduwi.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/2b5008e0a27b7fab2f48b2646841a448/lajuxuna.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/tinolivijupiki.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/3d58da9ceaac4958d35144d3f1a5e184/80803926359.pdfIn PDF document text
    • https://norservis.cz/files/files/vapadasegezeg.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160fc443624575---pogijirof.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b78488481---8172533767.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc06bf52185---69901411989.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/831ef47b6bcee969737743fabfcd5ec3/matubowozuwatelixobinipu.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210722081659.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b2b7b37a8---48881043564.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/94330198632.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=mia+mp3+song+download+mr+jatt+punjabiPDF link annotation
    • 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_off0000cb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB85 16720 bytes
SHA-256: 2dbf8966d354851e35ae6557b0dc83f51550b487a03344bd2f404b1793dbcf75
font_01_sfnt_off0000f744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 11224 bytes
SHA-256: 234b0a9c8a05d71879fc67e69fc422f228643c2c96b06d5c43425aba6840b7ba
font_02_sfnt_off00011124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11124 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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