Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d95d14e7146601…

MALICIOUS

PDF

76.6 KB Created: 2021-09-01 05:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7371846e529bfc9545a125126ff23a66 SHA-1: 45e90f0e7a06c223b3fa286c16ff6151cdf21fdc SHA-256: f8d95d14e7146601197dd415b3646f4f42212cfeca0362cbdea2b285c367dec4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious files or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8fea1cbd97---domawe.pdf In PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/50492468678.pdfIn PDF document text
    • http://demkapi.com/resimler/files/fogagijefig.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610ff2fd515e0---74967569774.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa9f396718---pifufomomepiwad.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2a32541e2---juwajinigitedu.pdfIn PDF document text
    • https://zoldlaptop.hu/ckfinder/userfiles/files/39133868812.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/08fc722973e7dc1b7caf147bef343607/mazivaremiw.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/mefofenamixisabiwuvamo.pdfIn PDF document text
    • https://datxeninhbinh.com/data/dulieu/files/83474116276.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/pezibivatimidotatefid.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/1794684207.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/lunixitovezekiwiwimewuwew.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/80360682792.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/79408594194.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc8c86a708a---fukaru.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/zonor.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/kipolekebuwasifufoz.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4646b24901---lixogijojavofefatiwojen.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af90d4c7744---74181375182.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/sudulumozemate.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/jotarunadomowusijuwiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=flossie%27s+bar+%26+grillPDF 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_off0000c760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC760 10052 bytes
SHA-256: 0aaa4946c6e53abf0f77c228409b93fb2d472d67f0a3d3b7e67ced5512bd0c56
font_01_sfnt_off0000ddd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD8 17640 bytes
SHA-256: 7089a43929da683f7b1ebf05cce1911e616405ff8a89c499f9d321d90e491e04
font_02_sfnt_off00010bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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