Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eae7e5e8dd6c2fe…

MALICIOUS

PDF

71.0 KB Created: 2021-09-13 18:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 320254d336add4c44532c7258b3d6cbd SHA-1: e1466da0dce8632987c32b3b30a83907e27809ff SHA-256: 5eae7e5e8dd6c2fee6030107b97dac4e4b3724b089cb56a307b1553d358a84e8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The primary purpose appears to be to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613a94268de97---ritawomojomapovotal.pdf In PDF document text
    • http://sincaremedicaltour.com/js/upload/37682889668.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/52579574309.pdfIn PDF document text
    • http://allier.proximeo.com/ckfinder/userfiles/files/jegog.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/jomigi.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/67129019305.pdfIn PDF document text
    • https://enilubricantvn.hoakhanh.vn/uploads/image/files/17323838151.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/kadipanexejemabob.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210911_1310B97AF5C0F810.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/dozepoxininemeruk.pdfIn PDF document text
    • https://nieruchomosciturystyczne.eu/files/file/sajuxedidusamenovekonifa.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/19408534929.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b1a67d9fb---metevelogazux.pdfIn PDF document text
    • http://gardatrans.com/content/Files/43761947986.pdfIn PDF document text
    • https://prevodi-plovdiv.com/userfiles/file/dubigiwetatene.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/52654819058.pdfIn PDF document text
    • http://srtcivilnorth.com/ckeditor_file/files/75841200189.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/72753681075.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/93625232874.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/8ccd67dfd7b5a116270f6ac294c5e2fa/90381247963.pdfIn PDF document text
    • http://chongros.com/userData/board/file/70527215491.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/48463752973.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/gbb7urt5sse023hcc8321gcqbe/mijepovupuf.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a752dfb24---92206448955.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/47682639944.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109041949444287.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=pes+2019+android+offline+downloadPDF 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_off0000b6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDF 15052 bytes
SHA-256: 315060bebec8509927f927caba288c19ab35c94cd516914e78c1b67ca3cc6769
font_02_sfnt_off0000f4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 10800 bytes
SHA-256: 492e87e63a333d13782d0a5278e2dcdf61de24dcc81c68e8898747a369ef6d85