Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6981e5649063cd…

MALICIOUS

PDF

87.8 KB Created: 2021-08-03 05:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ed370d6f27f29ee6efcdb59e82fdcd29 SHA-1: ddb35388ef01eeb010c3e566f6f87cb01ffc5a3e SHA-256: 7d6981e5649063cdc08f745e736682a0fd6b98ec90d40848265ab73c76fd0e3a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the 'SE_INVOICE_LURE' heuristic further support its use in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://artecgroupservices.com/imagenes/file/tamiropanoragexezajusuv.pdf In PDF document text
    • http://wang023spa.com/userfiles/202106file/2021062100363970554.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/9182c64aa7ce87268174d86448bceedd/guvezewopebufe.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/fedojiroxetukasagaperon.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/likidikowaleduxol.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/24953880384.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/8c7c20af31b8d1518bdf200567fae8ff/munazaxaridujes.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bfd03e827---kokademadewomuxesejiz.pdfIn PDF document text
    • https://xistenze.com/files/files/bujuwakalewotaxaliwibuti.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a77235281d---tuganavujamigumojuxini.pdfIn PDF document text
    • https://toocapen.com/files/jabexirisedogegakudorov.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607570ebe0ceb---takateroxi.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/0bi84fjtkffdmuh7lu7bhr25j4/xikelebilaso.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/uhfo09idu8kdepucbjnlg1lcsk/96946528125.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbbbf63a6f---88343404796.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/xovumubezakoposovegob.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021070701192573499.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/durowunojojeko.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/liql9r9n4dcckkj53vrkgt5o8i/18053088958.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609b50a82a735---83547038571.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076981c5b9ec---13330992438.pdfIn PDF document text
    • https://sy-tech.eu/file/86591902933.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/90284105952.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/f1gkva8chhmmt39is5roq5fhq7/60223219600.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/95800186024.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/otvvdcq8eht3apfu82adkl247o/zipezaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=make+mailing+labels+from+excel+spreadsheetPDF 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_off0000f24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 17008 bytes
SHA-256: 1af18d2d4fb440141b492400aa9b4abe19fc97a0bdfd42909e7dc2027eec20e3
font_01_sfnt_off00011ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F8 11396 bytes
SHA-256: 090cb462b13f251331301c36b300ded5c381083ed1ec52d4a2b8efa809b9d685

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