Malicious PDF — malware analysis report

Static analysis result for SHA-256 9225f02c9f423962…

MALICIOUS

PDF

92.3 KB Created: 2021-07-01 17:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a30d5144ae5f17d0bd90e672b95740a5 SHA-1: 51c59576b8b8221beb185f585d255466fc5c784e SHA-256: 9225f02c9f4239628d9fb0e8567e1208634d50d7e023f91facd11a3ed0cd580a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample contains embedded JavaScript, which is often used to redirect users to malicious websites. Multiple heuristics indicate the PDF is part of a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=heuristic+cognitive+psychology PDF link annotation
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/qjir6mm77h6kjkke62t7esmuu0/wemupiriwofatetu.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/fetovuluzerevegozomosi.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/19434682277.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077eb0a542ec---xovujovexizeboregokuberiv.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987e1a48bba---zitipuwenapoxobirawe.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ugluq04096mvjhje4ukhtml414/18711907681.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/zugikuzazukizejejat.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/84af2455f7ece5b557a94afd7cb623ec/39109385387.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/liwizesofoniwojesovu.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/simatunakawopetipu.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/512162e58aeabb0cfc2323ab14b5dff8/begununokukizitofupiz.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5a391909b---rorobibe.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b56386c93d7---jefas.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f2e860232---81886422198.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/12830793391.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/9cedb358bb494f30036772667f9b190b/86654604032.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46265d1b01---rotanovuzozaxulebir.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/negufokatovaxamefeb.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ikld4rv26as9p2kl9e4qvuoo48/3453744073.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/jukokorud.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/iolahilqafrq41r9vgu032hn42/74674318889.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/e0a6f73a5cb74a1b923af69480aa1f9c/zisifijaki.pdfIn PDF document text
    • 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_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 17816 bytes
SHA-256: 8f026e087b8cda8d02ecc89884408429ab5cab5f2f9d35c84ef79e36c4594cd2
font_01_sfnt_off00013354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13354 10764 bytes
SHA-256: aa19d0548966266764f832297196b564dea44c5377a6541514f80c1d6ad41471
font_02_sfnt_off00014c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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