Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e128723daabeb05…

MALICIOUS

PDF

74.5 KB Created: 2021-09-11 09:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 13ef15fb8e2b5c91276b5e4e0cf7ecde SHA-1: ade6573d3c68e910b0c54fa17e42e2a911029acb SHA-256: 9e128723daabeb053709594428a00510c57973b08a83a0578aa5b28d85aadc79
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kientrucnhacuagio.com/upload/files/70028149082.pdf In PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/42103785564.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/57967268981.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/73228400869.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/412996179.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/zagemixixaxujexosu.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/zazugugife.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/30768462924.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/76221732405.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/liporivoxobejum.pdfIn PDF document text
    • http://aquatherm-graz.at/files/zozazoxuvesiwotasaluwetix.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161368a3b98f22---30480521302.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/dagobimejipezipuzivan.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/sapopuroxutoxigezoxir.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/38371274105.pdfIn PDF document text
    • http://gemcom.org/userfiles/file/55648159234.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/51950089772.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/8530163447.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/3434023224.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/81807826157.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/92929119927.pdfIn PDF document text
    • https://vendax.ro/files/file/92766808358.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1613320fa46fcd---11618992307.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/fuxejev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+install+any+app+on+android+tvPDF 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_off0000c1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C5 16308 bytes
SHA-256: 41cc790792d815bd320e1328c82da5c9fab4114adb50d1c1fae3d10801e8b8d5
font_01_sfnt_off0000ebae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAE 10512 bytes
SHA-256: 5f7137d693438fe1c8ccb04649a123dca9c91a3541bfffc89d8ed551df1482fe
font_02_sfnt_off000103bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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