Malicious PDF — malware analysis report

Static analysis result for SHA-256 58566ee4da708116…

MALICIOUS

PDF

83.2 KB Created: 2021-09-19 00:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5ad8205c008b1b6259bf5b95a65c948a SHA-1: a237d054903d1b9666fc3b1cc99b4ba295f63bd8 SHA-256: 58566ee4da70811692c810622a23b8f41ff6d878bdef9a68f0c2e62a0ad092e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were directly extracted, the nature of the links and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pomacanthe-art.fr/imagebeforeafter/files/35516770235.pdf In PDF document text
    • http://ownlines.com/upfiles/file/getone.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145376cf20e0---12018728861.pdfIn PDF document text
    • https://shunnasato.com/11586351738.pdfIn PDF document text
    • https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/biteneb.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/161423d037b5a7---80919396447.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/41817979740.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/taxiwadit.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/migeralopiropixajudulo.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/neripavukenodiw.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/l5qvfsg1jjnuonddsnbgp4me47/wonupaxojuni.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/nabaxefura.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/70962326477.pdfIn PDF document text
    • http://exim5.hu/_user/file/pijosit.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/97275293886.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/valilibovixajexazoguxajuf.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/4471241135.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/5302803490.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/poxojemogulesuk.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/52545868108.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/ekqopgshb5heu2pcki1v9eji11/98843402047.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/pedojivureno.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2652974529.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/58121300855.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/30c8798dc8a57b1e5e13fccb5b37ac14/jutapitikijarasafig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=god+of+war+obb+file+for+ppssppPDF 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_off0000dfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA0 10552 bytes
SHA-256: 1915c79e7af3bf24b93f6aee36489ff395003c2dbdb09f2b25686b22bf67a339
font_01_sfnt_off0000f7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB3 18660 bytes
SHA-256: 8e50cf043f2626e0a04b843c2e28513b851743092833199616093345e73da68c