Malicious PDF — malware analysis report

Static analysis result for SHA-256 798279ab3baa8868…

MALICIOUS

PDF

95.6 KB Created: 2021-09-06 00:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f7db9262afb0d4097a8d836d8a690494 SHA-1: bb5aab01e197341bc203073e2cc6a5bba1fe8859 SHA-256: 798279ab3baa8868abb9f33c388d3ed3f059ce69f3293fc151817142b8549d4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating it's designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, possibly leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 6

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=t%C3%A9l%C3%A9charger+pdf+gratuit+en+fran%C3%A7ais PDF link annotation
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f872da134---55176264883.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/0b4a1d40268bc747abb17c4adbf21734/6595607231.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/51296396062.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/a17f98eb463f59516e81e8cbfa9ed1c6/46345407474.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/wezubodoroxokakemibil.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/kosedejut.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096a3ddc91a7---gataweruwexitowuxu.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/mapoxexa.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/882990dc55cfbe6f892bc9437d646eaf/zigutazebozol.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/36133878705.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16111938ba8d97---13322484920.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/20151891162.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160805d9375d95---34972890476.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8h8ga5fre1r1cdgg4r5nj4udi2/95984179215.pdfIn PDF document text
    • http://abpaluso.com/upload/file/zobip.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/cc24835a52dd4c62fd2335a560809d9b/10147256865.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/xexetiwu.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/lotogus.pdfIn PDF document text
    • http://planbmedia.hu/files/47051202737.pdfIn PDF document text
    • http://wenxuezj.com/images/File/fagepopawowonizurizomodo.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7382616d2e---15292173193.pdfIn PDF document text
    • http://yurisolomko.com/userfiles/file/55765220239.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/27540994509.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f67f8909180---zolobadibuzapezujatin.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dfd9cfd77---jufuzenojimon.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/vazabijadadabutajiwanute.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_off00010a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A00 11196 bytes
SHA-256: 3b46bd6a77455cbad249a268f110bd0fe6aef8841407d39ee9c27a911089aa9a
font_01_sfnt_off00012351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12351 20000 bytes
SHA-256: 585ef8735909004bb0b1807489ca6062233b30a04f139737edb1ec07f2311a52
font_02_sfnt_off00015614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15614 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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