Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed94629af8eb5e5…

MALICIOUS

PDF

99.6 KB Created: 2021-06-28 02:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fb20bfc632e4190c6983d3ea71658996 SHA-1: da9828515e603a1331e84916c8d92711ed48b0d5 SHA-256: fed94629af8eb5e5f17457f1e3a81da2f687b4502cff7ad51c7bed7c13a5cf9a
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting domains. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://smidgel.ru/uplcv?utm_term=blood+clot+meaning
    • http://libron.pl/fckupload/assets/file/kolejewonofixibivuzirivu.pdf
    • https://beautyreviveshop.com/newerac2c/userfiles/file/pojilap.pdf
    • http://quickvideo.nl/userfiles/file/43333866357.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084181bc0fdd---gikeduzirigudagurewok.pdf
    • https://aspirans.com/files/file/susutokekosakavononugil.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/36888540307.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/gimuno.pdf
    • https://vieclamkinhdoanh247.com/upload/files/dowusopepagunajeka.pdf
    • http://andlupa.com/userfiles/file/5954577337.pdf
    • http://zaun-produzent.de/userfiles/file/26878276456.pdf
    • http://yuha.be/_files/file/lukisonisawab.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca713d9a5a---gikezamozoxanaduda.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b351f038f55---39698296265.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081156feda5a---belidevobomolaw.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609802012ce1e---25171841758.pdf
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/zuwaxumasubulaf.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/adfc93b57cff876aee09eb31b6a6ab7f/93345563851.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097e414ef3b2---betumivi.pdf
    • http://allprintusa.com/admin/images/file/2106030549.pdf
    • http://www.ecvbrass.ch/user/web/file/fivajilujamojalaxuwevo.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160766e25bd7a4---kejimivasirawubaka.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/smonj4or0uthgl13bt2in5l023/87496796451.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160902a5131f7c---32400568335.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001235f.bin
6536ec3a97780178714e8ad2198887216eabcfe102e14094290003d4087b4db6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1235F 17204 bytes
font_01_sfnt_off00015064.bin
365a585d598189bc22da80dc38d6196cd2c5b05a9617b161010431c445c228ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x15064 10500 bytes
font_02_sfnt_off00016806.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16806 16792 bytes