Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59274aba8eb9db0…

MALICIOUS

PDF

77.7 KB Created: 2021-09-06 02:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bbee650eaffa59cd0ca3c6b744a38291 SHA-1: 31f6d14cfb1c6dff5d05b3e60df2de1557b70596 SHA-256: d59274aba8eb9db0b4d054e1ab543da6b4a8ca6ac94211707004c8dbe4d4668a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://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://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_off0000ccee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEE 17044 bytes
SHA-256: 177d2bdbd2babb7d5042c5e429a0948cd9e00f1fbb9e0b5ff04bc74a0ce98cb1
font_01_sfnt_off0000f8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 10724 bytes
SHA-256: 084bdca674d5aced12253ce127c4d3d5bf93aad8ea4dc0a13f60b713398cc80e
font_02_sfnt_off00011133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11133 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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