Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f75d36a00ddb85…

MALICIOUS

PDF

66.5 KB Created: 2021-09-06 02:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 49beb125612d115380aaf39c792db76c SHA-1: f35849fb1e8b3e7497c62fbfb69553b7363a8877 SHA-256: 56f75d36a00ddb85c6aa630ad4d57c129e48687f6cf453b0bf3c04cca20c3a72
154 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit kits. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8255

Heuristics 5

  • 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
  • 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://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/5tvoukp5gr4285o2csgi9uep5s/remewofivemokaviga.pdf In PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b2231267270---60025261654.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29592632384.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/xasuzawo.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/23660143327.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094ba20ddac4---27843425689.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b9c74d63e---venovuvugosefinojunotozas.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/82919972538.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/8bus97t9us75nmq744195ufuo7/16687942473.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a579672c108---viviluzuk.pdfIn PDF document text
    • https://tekmaker.com/upload/files/baworatevupomunuwexabari.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/fudasogibam.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/tanowajadufol.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/foturavakudukix.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/88744084861.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a094a6230---44953580772.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e2807cc2d7---ledokelubetilezezel.pdfIn PDF document text
    • https://harom.ro/files/file/vapuxizegevuxalaxo.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/wolevileda.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/fudizuvag.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5350e466e---vefumopudek.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/51496973706.pdfIn PDF document text
    • http://kasargod.net/uploads/file/66397552665.pdfIn PDF document text
    • http://gotween.com/userfiles/file///71536913109.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=fermentation+pathway+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEE 17044 bytes
SHA-256: 177d2bdbd2babb7d5042c5e429a0948cd9e00f1fbb9e0b5ff04bc74a0ce98cb1

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