Malicious PDF — malware analysis report

Static analysis result for SHA-256 42550ebf8a99ee67…

MALICIOUS

PDF

409.7 KB Created: 2022-03-04 13:59:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 3199226f7f0edfec4654e286f0827b6d SHA-1: 5d3b1a153a510c51447bfd96d10cb9c97dd8d4d4 SHA-256: 42550ebf8a99ee67ad912e486740862d44b58625114763d18b8e6e230eaf6f99
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and links to external resources, indicating it is designed to exploit vulnerabilities or trick users into downloading further malicious content. The presence of a link farm pointing to compromised WordPress upload storage and a redirector URL suggests a phishing or malware distribution scheme. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6715

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://sunuf.co.za/XSRYdR1H?utm_term=family+allowance+application+form PDF link annotation
    • http://protezas.lt/i/File/mijunelife.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/widex.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/12a10557d07b9211a31bb70ce6f1562c/87257538802.pdfIn PDF document text
    • http://vhshf.de/File/widebowo.pdfIn PDF document text
    • http://personaleducador.com.br/ckeditor/kcfinder/upload/files/resavatopejavumukujibur.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/redoburewanuneba.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/75187345679.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161fb50252116a---6866047436.pdfIn PDF document text
    • http://for-man-woman.ru/userfiles/files/47310556527.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/45410323293.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/pjis6je9267j3e3noh0r2ihej6/tozejer.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/4f7319efd5a9fe2efe7ffc3814bfe266/47644552457.pdfIn PDF document text
    • https://www.iccct21.scrs.in/kcfinder/upload/files/sosidinex.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/56241231086.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/41024012092.pdfIn PDF document text
    • http://svm.kalistecom.org/img/files/73470235422.pdfIn PDF document text
    • http://atlasbasincli.com/panel/kcfinder/upload/files/difuvudixenibukuzediz.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/88549467737.pdfIn PDF document text
    • http://veszpremkosar.hu/_user/file/95786921169.pdfIn PDF document text
    • http://t-700.net/upload_img/files/70616214248.pdfIn PDF document text
    • http://321eastern-thailand.com/userfiles/files/wikasivitibinevoniwig.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/83130068086.pdfIn PDF document text
    • https://expomediainc.com/upload/file/15828924279.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/79745461170.pdfIn PDF document text
    • https://entabe.com/upload/20220210/files/59419067059.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/17471936095.pdfIn PDF document text
    • http://duz-drustvo.si/uporabnik/file/befubulasa.pdfIn PDF document text
    • https://hoangmailogistics.com/asset/site/files/sijowamuwixovosuvikam.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/56261556064.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/goxetogonovevutisemej.pdfIn PDF document text
    • https://bilgepen.com/panel/kcfinder/upload/files/mafage.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_off0005f496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F496 18968 bytes
SHA-256: d4442fbd933bd81b2cc6648943a73842715dc047b3fa9f4604a0b6b0c70500b6
font_01_sfnt_off00062580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62580 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00063ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CA0 10648 bytes
SHA-256: 110e4fb307fed99699962a8f28216724a963058085a47ef07e08093a407dd95e

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