Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a87f821e67cac3…

MALICIOUS

PDF

79.5 KB Created: 2021-11-12 01:13:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b376a0524a91c4e9936652eb48b5e470 SHA-1: 775dcf2b610d2ba5fce9700a39e4324cb3bb7edb SHA-256: d3a87f821e67cac30f95b5187c052bf581abf4591399041c5853d70c345e032d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically a payment redirection scam. It contains numerous links to potentially compromised websites, many of which host PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to trick users into visiting malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615b769ea3e99---moxediwovukagufozoraniput.pdf In PDF document text
    • http://actlogistic.vn/upload/editor/files/45098654686.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/77364614955.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/gujexazazutunaboramagi.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/da47c0680b9bb955e9cb75a044412f5c/23414774315.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/16401822126.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16168fda98d496---15523875395.pdfIn PDF document text
    • http://globalcentral.net/contentupload/fckeditorUploads/organization_/file/30818371290.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/64621793613.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/74654384937.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/dudujovufawov.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/risemubowaxu.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/gitisirilagezozapate.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/35196294629.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/xepinosidazinipumidam.pdfIn PDF document text
    • https://cargotavio.ru/files/file/legekozot.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/fapopudizorarumuzitijofas.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/cec0f775939abefba018c493c1ee4f3d/xipozeva.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/fozit.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/wetinizuvel.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/wodade.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/gejavekuza.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/buvasazowif.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/41169285282.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/dafanim.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/gozikidejok.pdfIn PDF document text
    • http://findacommodity.com/upload/file/senovafopumutegevolu.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/HTGXzuRVGb4/uplcv?utm_term=ownership+fee+simple+meaningPDF 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_off0000d3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D8 17248 bytes
SHA-256: 3e108ad1ca3752cf1f53bf8fb21be314ba739660cf07c4658ec897b710e83c89
font_01_sfnt_off000100cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CD 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_02_sfnt_off000117f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F3 10700 bytes
SHA-256: 7db727b17b2825a5a2cdd1f2382c7e532195577327a43f53e42cfd65b5c506e3