Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0aca2f1e8003e1…

MALICIOUS

PDF

76.6 KB Created: 2021-09-07 00:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9659b2286070920418f0b6eee1a15930 SHA-1: 9f5f2d35f7ccb670feffe843533f689a9b7c7734 SHA-256: ff0aca2f1e8003e1114905bf8e252fbebf1dcd54db2ccd045b481f9973ffa44b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, suggesting it is part of a link farm designed to lure users to malicious content. The presence of these links indicates an attempt to deliver phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://medvor.ru/uplcv?utm_term=marriage+and+slavery+in+early+islam+pdf PDF link annotation
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160be25a9caf69---mewakupizudilisul.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/26167691902.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad63a4d6d96---lofabotexik.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/36530233960.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/87451493054.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/gonalijikax.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/218404b392924b527f068c89df87c5c2/murixopowipivoxuminosuzo.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/k6arpk7lebbphbv9itslecnbf5/sozofumaxolevawemig.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/39365982504.pdfIn PDF document text
    • http://tj-1970-50yr.com/clients/e/e8/e8fccb6fb94f20b6ca4375945b3939e1/File/dezinumotogeg.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/9ce59373cfcded7b3cae41d18b50d04e/legawusemogiz.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/wulelijajamomizu.pdfIn PDF document text
    • http://ave-france.com/pics/files/8359727999.pdfIn PDF document text
    • https://dm288.rs/slicice/file/98618618578.pdfIn PDF document text
    • https://berbagiangka.com/contents//files/fokukaroguji.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd1439cc1ae---49789225656.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/97174831780.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/5634472bb5b745315b0101dca2f2477a/7612906806.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/faxujan.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160976f1126d2f---46439752637.pdfIn PDF document text
    • https://bor-diing.com/upload/files/54435817073.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/dokixepada.pdfIn PDF document text
    • https://bloomeng.com/uploads/bazaxoga.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/f0b05381457113b92e0b6ce25ba6b195/mulefawol.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_off0000c4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E0 10796 bytes
SHA-256: 7b5841e62f2f2421e63d691b58298f01ed524ccc5dc48761b84240047381e9c6
font_01_sfnt_off0000dd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF592 18652 bytes
SHA-256: 02de10919f4de9b78120d6d9ac9afcf2f5e69d4cdf57e862bc2903d4c8d8cd65

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