Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2598e681efa1d3f…

MALICIOUS

PDF

73.7 KB Created: 2021-09-04 20:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 963e89c48e7ff9f6bbb678f89a33a47f SHA-1: 3c0c0a6caf28d488f3e747bd26efe19072a41eec SHA-256: e2598e681efa1d3f1e29d05cd9e2afd6568cba1a6a941a7208497263ebff2e87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://pixomot.ru/uplcv?utm_term=synflex+manual+hose+crimper PDF link annotation
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/7e799aeb19520b490bc49774c1b17ff4/bowudekivukokirat.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a853baba87---xotekivezowase.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdc54e7096---gedoragadosogujidumataze.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a44475e5a---sufuxefakisikopin.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/lelofikukada.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/35463424636.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/82475404476.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/3006316517bc05c4fd21d4e72f060766/novixadapulavuk.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/89939635590.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/jo2rkpenvkjvc11de57157q7c6/maloxesoter.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/zidiluxopovuwafinovated.pdfIn PDF document text
    • https://activepymes.com/pub/file/rolebatedipekegaku.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/miwoweniponitog.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/83a3250d40292d4df3d7e106ba06a1c0/39492834921.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/e6ed7e711e2dddf1813582a570677687/79204601292.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/36120372370.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/82720032137.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/kegelo.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/fupifodulegon.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609a017c61838---vosigapugefopafolepe.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/nhpr1mqes75v42matkv3r3vmom/53704590057.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/9643626880.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/70669891012.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_off0000baa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA5 17284 bytes
SHA-256: 82986a287b69fb78ad54c273829b6115a298ab9fd7ebe0244810cf88bf7ed10e
font_01_sfnt_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1B 11036 bytes
SHA-256: d798405af7ebae53ee705d08a76c81965956bef459eb10de7fe2d3105d7e1336