Malicious PDF — malware analysis report

Static analysis result for SHA-256 6304f1f5bb0404a9…

MALICIOUS

PDF

81.7 KB Created: 2021-11-04 15:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0b485696d60077e3e9a5be0478851b44 SHA-1: 8610c77d17a7fc7fc34ac3600033d125b4cf22d7 SHA-256: 6304f1f5bb0404a9b8a557d089fbd84eae1203609b9d736e625ea43c5ff6212d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for delivering malicious content. The heuristics indicate the PDF acts as a link farm, pointing to multiple compromised websites, likely to host phishing content or further malware downloads. The ClamAV detection and ML classifier strongly suggest malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://gemmacapitalgroup.com/foto/file/52852062657.pdf In PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16153b00323888---86696693108.pdfIn PDF document text
    • https://pacientes.quiroser.com/UserFilesQUI/file/revitafizuf.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/63433860595.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616e06e7a3247---larosawifozetukesezatupiv.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161523c0c011e7---fodoxofobiromojubufux.pdfIn PDF document text
    • http://anm-av.de/uploads/files/retazikesuse.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16160b3a1a0094---31213277284.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/44875588922.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/81311764930.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/8fb28dffa272112b9253017750c9f969/93551703084.pdfIn PDF document text
    • https://gdaniec.com/upload/files/58914225223.pdfIn PDF document text
    • https://pacpartner.net/images_client/imagesfile/wuzezeniwufadutojodaxo.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/68258709008.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/98441315937.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/77100267864.pdfIn PDF document text
    • http://strandedtattoo.info/file/xapaloxeguvakos.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/nutinimutatokagitanalop.pdfIn PDF document text
    • http://tallygroupkwt.com/uploads/file/13867056696.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-16/20210916133317870875.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/53392528534.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109012102417315.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/53082276383.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/darekizenefovor.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/70980367193.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/TSvcnjQ06Jg/uplcv?utm_term=the+orchardist+reviewPDF 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_off0000e009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE009 10432 bytes
SHA-256: 113c8515854a41eb89dd79ee5bbef7a0230ef41020ea4824c4fad53d879e6d2d
font_01_sfnt_off0000f7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E8 16124 bytes
SHA-256: b231e0ae026c2c76344cfc98705551708ac12053bb8151c060008a05b2bdac0d
font_02_sfnt_off000120ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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