Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcac19e8ecddf337…

MALICIOUS

PDF

69.8 KB Created: 2021-09-27 18:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 081ab70c1fd66a94ade6d2121f2c0207 SHA-1: b9d80a37552401e8676440b52b670e5ebad0001c SHA-256: fcac19e8ecddf3373ce58ade015063792a208911ae25cb688725e767dd6782d0
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of link farm techniques indicates an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://huntic.ru/uplcv?utm_term=the+power+of+your+subconscious+mind+download PDF link annotation
    • https://olgunbey.com/upload/ckfinder/files/60166258362.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/56176337201.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jonodelademabagilavefetip.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/fdd82db7a6902fddc6c992b680159924/gugedesan.pdfIn PDF document text
    • http://riviera.az/userfiles/file/kumejukososetug.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/54244044306.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/jutot.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/gibarunalokete.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/lezil.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/46629743235.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021091603444537.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/pijijug.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/f74c5ebf9e562aac0d51c8a747663f3e/zetujagaruba.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/bc4fa400ea124cd5d77ce8cd4e99dfda/90572714564.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614488de3e125---wedulejomupaboma.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/xagikuwituni.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/60512125899.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/3843816646.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/bowagixajex.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/83922747002.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/40980462286.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/zuvapamutizumip.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_off0000ae9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9E 11188 bytes
SHA-256: 616ee9174ac8c0bd8793bb4ca84ac2df1726cf89c65e646152167a7cbc2013a1
font_01_sfnt_off0000c879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC879 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 16252 bytes
SHA-256: ba361ac5558e86988fc5d3a8732c874f888a624375cd40968eba41834e262636