Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff46edbe353499f…

MALICIOUS

PDF

114.1 KB Created: 2021-09-17 08:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 86014951b373c2b3e1655436ffdc6fc1 SHA-1: 29a05ff228430526dbae092020d14d676fff28f1 SHA-256: 0ff46edbe353499ff63ca866b5ef469dfeb0e08aaec19aee9a64c5f167a778b0
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://ketchas.ru/uplcv?utm_term=colin+drury+management+and+cost+accounting+9th+edition+pdf PDF link annotation
    • http://konferencii.org/web/uploads/assets/file/59753380446.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/bf2b8a3e8580898472141782c74cd782/lomuzamitazimebaz.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-14/20210914050536538841.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/9221611010.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613910b2078ad---20417371053.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/wujefedutoku.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/wukididemukinetilasozo.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/45141275835.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/kitofeluruwadavavuzevo.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614277b4d435b---41335285344.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/xorojitibarerukasofika.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/5f88aa7d1de1e93d22590d8c67fbc866/29799450326.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/ganudimipofu.pdfIn PDF document text
    • http://itexpertdog.nwoasis.com/upload/files/vijovegepudetazesatuzu.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/bowotelixudine.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/16368008067.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/lativuxekukupusafufepuke.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/161402136103f0---wisudevudir.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/ruk936a88mn17d73coh9hdbmf3/bazuwobipezulo.pdfIn PDF document text
    • http://patroha.hu/file/jujukaleval.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/fowogukagajax.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/duxuwa.pdfIn PDF document text
    • https://perfectprojects.ro/userfiles/file/nijikutigodevexodusina.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/59248299396.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_off00014c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C58 22172 bytes
SHA-256: 653f47283541d906a0bee291dc25da82993fdc68017ace4e35d3e3e2b4611ba8
font_01_sfnt_off0001869e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1869E 11480 bytes
SHA-256: af27aab913a507b63198ab8fa6e2155e8a90753f67d742c8a57ca59cb691f599
font_02_sfnt_off0001a174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A174 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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