Malicious PDF — malware analysis report

Static analysis result for SHA-256 5269dd2faea7bea4…

MALICIOUS

PDF

91.1 KB Created: 2021-07-10 13:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4883228e72dd1db87aa7b03534cce0ed SHA-1: 96d6745924dd4885049083c93cd6928848802ed9 SHA-256: 5269dd2faea7bea423fb0e355324535a1c0f83a43f1a3c712d083d29a5f6bdf5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://orvosvalaszto.hu/uploads/files/bavemiginugoleluxogolera.pdf In PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/kabomof.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/tuloj.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021061311472573499.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b23025beaf2---79006600835.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/3d6jmcsl9ldnta6thq2g19pvcl/xejigisanipeduna.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/28522040166.pdfIn PDF document text
    • http://ekotronic.eu/files/file/momewemalodo.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/21395841060.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/12951012388.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb2072e0fd---xogawofobukunixinikexiw.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/dasozufexaninenaguwaki.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/8629165134.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/19366147574.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/3604288bb15d7c0a460af3cf3e3f1ccf/12285542286.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210701_120B706E23D4A4AF.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/nazobebovefufumo.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/2nr36mt4vka4i8kqadbjq3ve30/79902710735.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/b2tm94ghq1a47jeoo50v6vc3mj/66673294232.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/23461a3e4251dbedd830212e57544138/83270072906.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/10919458776.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16087af924d339---48151179437.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/8dc48afd9326b4b456494ad4ba432c50/26411322438.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/13bolr7g4eovjo7nds0u34ira3/88442974291.pdfIn PDF document text
    • https://termoformat.md/img/files/80224713660.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/73499171925.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=elements+with+properties+of+metals+and+nonmetalsPDF 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_off0001002b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002B 17308 bytes
SHA-256: fad8bb833788a6251f8c1782ca82dd959fb78c31aa7e2080bf47fb4eeee542d4
font_01_sfnt_off00012dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D7 10832 bytes
SHA-256: 4773ba63c954f19b287d87958ee291edc2010e35035e0c4368767c6cf18a5b24