Malicious PDF — malware analysis report

Static analysis result for SHA-256 8005b32b3fe80c3d…

MALICIOUS

PDF

96.6 KB Created: 2021-07-18 09:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cabcddc7a4a2dc212ac863f1955c335f SHA-1: d8ac5c27d464fed2b346388e636e689dd7652324 SHA-256: 8005b32b3fe80c3d20b40a88251587ddeef144657c8e2daab8fc865bfe86432b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. Multiple heuristics indicate the PDF acts as a link farm, pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The embedded JavaScript is likely responsible for initiating the redirection or download process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a31a6e61363---junofazi.pdf In PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ba5506c82---2591714513.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/87649245675.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e09a9b390---40511881034.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/xoforinozonigane.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/79785716751.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/858c8b1a1ff51db9a5084a753ca4ad5f/69576706144.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/utmlmhjp52unsgjpb5n8fdfuj3/62761491888.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/894af361afa0aa8d31760db1af1a9874/vijiripoj.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/81109742673.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/7fa1b2fc7fc20a47fdeccb92a721590f/81867234728.pdfIn PDF document text
    • http://sibmetiz.ru/upload_picture/dugijiguzanasirodexid.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/sabuk.pdfIn PDF document text
    • https://buyafranchise.org/files/files/88402975246.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608163ddacb74---55414976722.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e56aa3d8e---devokigaguxude.pdfIn PDF document text
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210702000157933108avjabx.pdfIn PDF document text
    • https://kuepancong.com/contents//files/93456145913.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/wajujibosesifotedazoz.pdfIn PDF document text
    • https://tsegypt.com/file/sukafozemirekajariledit.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/42904024463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=temporary+injunction+against+constructionPDF link annotation
    • https://bit.ly/3gYIbNbIn 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_off000116e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E7 10980 bytes
SHA-256: abfc9adcb8c0baa63c57f7896774540e425a2c42b4bc1966f1e4d6c444d6217c
font_01_sfnt_off00013067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13067 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14879 17108 bytes
SHA-256: 8d6f0b3bbb41023c68c7265f75664fc283ee0f56d400b97d84e24b7b88997c73

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