Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2d287cdf6d6efd…

MALICIOUS

PDF

81.7 KB Created: 2021-09-19 09:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 25654987a4e27c17064750c7ebde7183 SHA-1: 32defb10b69cd54ea41f85c7a3da8a26923e828f SHA-256: dd2d287cdf6d6efdf0feaed6ef7ecb7e799e8e3515ef11feb538c794638aadc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The document body is unreadable, but the presence of numerous external URIs and the link farm heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://proetcontra.hu/userfiles/file/pexudirelafovexegefiteseg.pdf In PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/9b809b2cfed287456a9553ecf43ffc7d/59786443133.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/pefod.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614320bacdaf0---97679677823.pdfIn PDF document text
    • https://oasis-travel.ro/files/14021756610.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/79644198649.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/jowixagejudanitawuwip.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/55822919493.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614097dfb9e9b---rajesosositutiwabovivogu.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/62013030511.pdfIn PDF document text
    • http://stefani.cz/fck/file/11118247258.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/latimuwafafo.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/e82d9fda94e3ceb5e3bc3eccc6a72198/momagaxogetafeso.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141771e4c4bf---nuxolu.pdfIn PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20210918040639.pdfIn PDF document text
    • http://mopron.ru/upload/files/vawetekalagegitogurozewi.pdfIn PDF document text
    • https://yasacompany.com/upload/files/rasujuj.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/lezab.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/wewosezofaniru.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/naxezitan.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/pukunowepubabiguwizon.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109170424451467.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/kisonalemodizaganamofa.pdfIn PDF document text
    • http://inistor.com/ufiles/files/mebajimilewujesuto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=youwave+android+emulator+for+windows+free+downloadPDF 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_off0000dc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 16796 bytes
SHA-256: 4f0e9d09aecd78197059529ec186a00f21fe5d2b7598aeb3310969e2de14f74a
font_02_sfnt_off00011fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE6 10752 bytes
SHA-256: 1b10dcdd36c1362687c5d2199cc0746573837b92753e92f7f82a67e76696880d

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