Malicious PDF — malware analysis report

Static analysis result for SHA-256 4249ee3b9935e68b…

MALICIOUS

PDF

85.0 KB Created: 2021-08-14 08:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: d3a476034aa728629eb32c73fedb126e SHA-1: f3f0cdb1063a6348d032cbf90b27bcdfff7c4cbb SHA-256: 4249ee3b9935e68b5045e239f9318e4e071d9627e661fcd88fbeb2bd9420d238
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://profitaler.com/UserFiles/file/nebidalewij.pdf In PDF document text
    • https://natyabio.com/uploadfiles/12694626576.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/d2da46eeb522b0d07f4a865736bd3e23/nonalufusoto.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/96308616126.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/zufejixi.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762eb09bcd6---dowakibobasutepetuk.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/q2dhvftqc8ufghkj677o47mjj3/xigubalabolaxivalujotu.pdfIn PDF document text
    • http://valeneighbors.com/userimages/27087791077.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b138af2f5---wowetejolina.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210625_989CCC6286CE39CB.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/o74v8kq463plnjq88lj9ee4ka1/89989406130.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/nefozavubidumudugo.pdfIn PDF document text
    • http://skyrybupaslaugos.lt/uploads/files/2943174771.pdfIn PDF document text
    • http://minicabii.com/survey/userfiles/files/77570898141.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/omkmorm3nmob97nffofmf1ttio7k2pg6/bejonafideputab.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/48958360434.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/nuzoxumatuxuzujedufepajug.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/busuzazozo.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e17f7800751---41672338856.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/gifuzun.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/korafekuvoka.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807cdf61b48---24717784642.pdfIn PDF document text
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/zufejojezuzulogaj.pdfIn PDF document text
    • https://mollis.rs//files/zamomazar.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/vezifekuxexe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=cien+a%C3%B1os+de+soledad+pdf+scribdPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDD 10892 bytes
SHA-256: 41d2c86f10ecce357cf340daa19c8bfb4d03ba5aa6aafa65521a5bac18d14de4
font_01_sfnt_off0000e8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AD 17752 bytes
SHA-256: 71fbd2a2ab5bcfb2d574fb959422c51b8c12980cc124015aef815573f29d05e8
font_02_sfnt_off000115b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B7 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_03_sfnt_off00012bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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