Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea0270495a65893…

MALICIOUS

PDF

82.0 KB Created: 2021-08-27 21:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: de58757e61437d36c95259284e7844a9 SHA-1: 758bfe0f4d9509004d210e2d321f13671196e14a SHA-256: cea0270495a6589346f5fbd533966b99c875c83b182e67624edab38eb4e8cd9c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on various websites, some of which appear to be compromised CMS uploads. The primary purpose seems to be directing users to external malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pixomot.ru/uplcv?utm_term=app+to+highlight+pdf+android PDF link annotation
    • http://riverbendhay.com/clients/4/4e/4e1cbd84181290ddb66fb035c9950ff6/File/nifetazazezokebutoxaxotu.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/14504846184.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/7018602935.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/c17f9845181131b465d580a3a5550369/41591965936.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075110dd045f---10568757219.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/93426040408.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/mijiv.pdfIn PDF document text
    • http://normel.org/files/upload/file/33442089780.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160959b910c8a5---dumezatimilitopifitefevoz.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/ej12mn4nm868a95utj854le7p3/74552304655.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/fojapomavilopoluzukiz.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/24541214407.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/xagujusogafene.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/30815916850.pdfIn PDF document text
    • http://gyorszol.hu/userfiles/file/34018916145.pdfIn PDF document text
    • https://tl-systems.hu/files/files/gofewafubupopuz.pdfIn PDF document text
    • http://geodez.com/pliki/file/71469811502.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828f05678f3---45352687268.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54721719503.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/g8mfnnirje0oqbj676p99nplkm/33414226217.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/xiwegomaxodebotorimuzow.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/78831167430.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/47241044706.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160be89cdbfb3d---53166473455.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_off0000dd3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3F 10456 bytes
SHA-256: 9b7ff5279d56ebfe44b9c76dda0180175ac7d56de3e42337b3dc2f1d899225df
font_01_sfnt_off0000f4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A5 17120 bytes
SHA-256: aeb0c7c4bfaa2a5465ca044f1c566eb2ba96d46a6f7fed4554a51d544b464336
font_02_sfnt_off0001210b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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