Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7cb7711b762966…

MALICIOUS

PDF

99.1 KB Created: 2021-07-10 08:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c1fcbf319dc6ee3bdd2d280d59b67aee SHA-1: c92d41a3b8b0bec39c5b922bc0d449bc986f8c85 SHA-256: 1f7cb7711b7629662e7b08d10450006bfbb26a7cdd6353d0a155d7d39bb4627e
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b52980cec3---25770858596.pdf In PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/c74d67977fc0966c8f512a2db0ce18fd/47509604656.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/87005154828.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082455e05170---fejibesomuponamejebu.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2e45bc7d9---41539215410.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/46394293354.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/73632130707d99ba1462d55f0db31a4f/surisuteronavosavina.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/fokowexisapikawifivit.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/vobeworipapivabikibozajo.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-4/20210504104900388820.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/26116394032.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/0571117a29bf0507fb3a61feeef0b207/6417587833.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/0i8e96ver237f373jgjo5khqf0/22757048536.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/d99137f03aaf1750d97a50b23ec8f480/65029651457.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/dd853534b5c7a8fdfae9517390176b06/83316610053.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/xokutuguganogewinuk.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/888624fde69a87df3a808dfd21b7e71b/senuzojadewapapala.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/2vbuho1c7gg41idhkjug68utfi/40653271153.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607560deab64b---zawodowupaxamukasuve.pdfIn PDF document text
    • https://viratrip.com/basefile/travelasreviracom/files/14291339847.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2dc2ba28---muzofolel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=personal+statement+template+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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12395 16796 bytes
SHA-256: 91857c1b29c98ca67c6a3effaaa88edbb9c40626809f4fd1dbddda511170f36f
font_01_sfnt_off00014f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F26 10568 bytes
SHA-256: 37854b9b791df3f5a05293eb4e977514af171ab16267587a5a77bd6aecaac617
font_02_sfnt_off0001674a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1674A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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