Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0f82bf8aa7e77b…

MALICIOUS

PDF

121.0 KB Created: 2021-06-28 04:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f6cf5fe1073108ef233ddf64dac697ed SHA-1: 24ca5b5075c9fd55d0b35b57f863a6ac4b9e6f2e SHA-256: 8a0f82bf8aa7e77ba5b6eae3b39efe0a1d784e2293f0d0489ce5850d8e6dabc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing to multiple compromised WordPress upload directories and other disposable hosting sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://bukharageorgia.com/sites/default/files/file/6181284761.pdf In PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160946a2d64675---13117261115.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160807db464bcf---kinekinoxuvokexiwawudo.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/wawilarebujuvuwapiwumaw.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fef474c391---94762260255.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/eb90a1cbc5661fdc7575fb303eed26a8/19773219433.pdfIn PDF document text
    • https://loctra.net/userfiles/file/5165004474.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/f13df8ccd1279a107ce43429d0b7c7ad/94122028313.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/kikawu.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a530ff3120c---xutukomuligosaruxe.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1cda960e0---mujareralotuzerefap.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/6e6f631276612cf128ac5cc797c2a61d/dijitulimuvopor.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/65396598690.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077544eb5d2d---wivasukizininusabox.pdfIn PDF document text
    • http://simonide.org/userfiles/file/75898384620.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/182a4c8befff94f29b63d65145417013/tafitagen.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/029bd46defc901fb68cba8683fe38999/74005086216.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/b8750fce641a0c2e5bbdf4f1dc3d3ecc/25977277245.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/bisexuveluleko.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/lalivuxaguw.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16084e2a6d3c9b---tefukibamizidunaxavumer.pdfIn PDF document text
    • https://506hlapeta.com/files/file/19462913914.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=core+java+by+ratanPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000175f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175F5 19152 bytes
SHA-256: f64cebc6233eb71b66ef47f78ddb62ad3d8201a5429bb04d6b59254b1d5bd809
font_01_sfnt_off0001a72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A72D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001bf44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF44 10276 bytes
SHA-256: a8e19fcf4cdced44546d69ce02988aa6d492d7feec98f246d55d10eb0a0d7cd1

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