Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc6e9ed277b0d1a…

MALICIOUS

PDF

73.8 KB Created: 2021-09-07 13:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 94efcf4b0a9cc3739b9c814a6f799f3e SHA-1: cf115c609c717e31f78572f11551b47e73b8d6a3 SHA-256: 6bc6e9ed277b0d1aa3fecdce20cfa13901684682c8e63ed8b47a8d174f898c9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It functions as a link farm, containing numerous external URLs that likely lead to phishing sites or further malware downloads. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement with these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://catamma.ru/uplcv?utm_term=action+and+linking+verbs+worksheet+4th+grade PDF link annotation
    • http://hotelclinton.it/userfiles/files/18526818732.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/51528359858.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/srsr4dfbi0jff441rchltpgob7/30382651887.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/255ac911c607ec6e30d06333cae1a808/48247395788.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/24723418536.pdfIn PDF document text
    • https://blugarden.eu/file/sowuzebukodejukazosigewel.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/2d71669cfc2566b3b64396c009a09d47/romedoj.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/0a6df9e8a08ad5e0b8e65df33b0dc3c3/96912157915.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/kilavizupetogogapojad.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7eb5a0294---kumutijivikirapelog.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/907af40d2f3b3c7b36eeedd8d7d2357f/70200722832.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/wezapijexat.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c3a3e4e77---32050686334.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/40531113087.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/luvub.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/f9f2ff29487e981e464c6c43e355d011/25203159661.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/63864748454.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/46625987625.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/af129d803cebc7872744e0a0de8a1b7a/22217473930.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/c292dc25eab9909a3e1dc4e132014708/84021686299.pdfIn PDF document text
    • http://articolo17.it/siti/usr/foto/files/81271483339.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/82742171815.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607df35f39a04---73391760099.pdfIn PDF document text
    • http://tavio.su/files/file/vapanodaditizojelux.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_off0000bebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D0 16076 bytes
SHA-256: 003a4721af39917bd83f6b3684786a80b43eadb9fbbd5073dae075ead1234e07
font_02_sfnt_off0000fff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF0 11092 bytes
SHA-256: cafdb80edf8890f124314a420bd9b9981eb5c953921a0f454de28091afdb5ce2

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