Malicious PDF — malware analysis report

Static analysis result for SHA-256 c722aac00235334c…

MALICIOUS

PDF

76.5 KB Created: 2021-07-29 23:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 24e1c6b37d08310a4da04ead911b1324 SHA-1: f3bcce3b890f33fb6b052813b5b7250210aac1bd SHA-256: c722aac00235334cb0f878005668a19b3d8c0ef2ea998974a77a6085fa4cf076
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://bititechnika.com/uploads/file/56812274491.pdf In PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1608e8637a3997---wakurune.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/c819f9a660abd3314f5f43749d44d665/muwadaratotami.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/padefanimikoru.pdfIn PDF document text
    • http://vendingchat.ru/uploads/ckfinder/files/22619585910.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608200fa9d164---91513210055.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/76439871170.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/mibovawisutenosebof.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d3daf0c7d---dibeduxatetutudire.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/n67gliasm1usrij0h8hh78v4an/92795620608.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/remebunurepiwukomuzedag.pdfIn PDF document text
    • http://salt17.com/userfiles/files/pamuwowodawemubiroxa.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071a52cea9ea---47665005841.pdfIn PDF document text
    • http://keramann.ru/uploads/files/94555155468.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8f33df583---7439465179.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/40177227873.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/84079722119.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/57878720804.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/68557659911.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/68606235656.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/jalerinirumozakusixani.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/ronurifu.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/4qodo3q79t6hdpmjfd0rthg46k/ludogiwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=stihl+fs55r+trimmer+partsPDF 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_off0000c79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79F 10608 bytes
SHA-256: 031630f7c4efbf4c197691ae9ffa01a8bbc89d063e30a3250f9c08b869c746bd
font_01_sfnt_off0000dfd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD7 16732 bytes
SHA-256: 0f479fd7956c9018bfbe45db11ea9261a70a7c2fb102e6e3748e9402bd906a60
font_02_sfnt_off00010ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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