Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a971c089f31231a…

MALICIOUS

PDF

72.0 KB Created: 2021-10-02 12:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: be367d83f68adf59f1dc9cc39670ee99 SHA-1: 7e0df3d2537c8f8f8f50e26ee67404e158bff326 SHA-256: 0a971c089f31231aa3d30e58db0a01517f818b773b476c37889c61c42754bacd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. Several heuristics indicate the PDF is part of a link farm hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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 http://perechen-izdaniy.ru/js/ckfinder/userfiles/files/xibexeguxoxagatomanutowiz.pdf In PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/64604143033.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210927215133.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/35875407837.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/14902516648.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/bc574699076fb29a60caca133df1bd5f/putovuxisewupuvabinegebag.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/2510858570.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/94658694109.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161557d47e707f---zaxisevoxiduj.pdfIn PDF document text
    • http://spbi.cz/res/file/bevuvewutaw.pdfIn PDF document text
    • https://inprovitcaribe.com/ckfinder/userfiles/files/sorupitaje.pdfIn PDF document text
    • http://disonde.com/filespath/files/20210929141206.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/josafumolifisotimaze.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/vadizamitogabowij.pdfIn PDF document text
    • https://cogi.sed-hut.pl///files//editor/file/dogenolewepifina.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/bewizutaluwasimoluxolerel.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/57157227374.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/bezeri.pdfIn PDF document text
    • https://simbhaolipower.com/images/file/ralijosopuwevazelesep.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614172a846578---51902485137.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/jogepanitawugo.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/damepomi.pdfIn PDF document text
    • http://ajej.pretty-match.com/upload/files/35915268334.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/hhe8k38ulvp4pj8ughj5geh3ik/14183306695.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=pharmacology+and+toxicology+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB270 10984 bytes
SHA-256: 3439b8043b884f40cda5c905e76d6f015178387831333fe03044fcd435385c4e
font_01_sfnt_off0000cb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A5 18176 bytes
SHA-256: 4f01d815c444239122864c27f9630cd44016f46e0a18bff97f9b97b31eec2023

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