Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce2c18be00aae06…

MALICIOUS

PDF

74.3 KB Created: 2021-09-10 15:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 22e0b491c9a137b4256cdefa478c098c SHA-1: fc5e7982df075d3cbb2675f8d658e931bbc78688 SHA-256: 9ce2c18be00aae06386a92706876df1cc35c295004a93dc50a51cc6a527ffe30
164 Risk Score

Malware Insights

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

The PDF contains numerous links to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://circolosilverblufitnessclub.eu/userfiles/files/kofodexizugadunofomexove.pdf In PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161328e426e5fc---8089059414.pdfIn PDF document text
    • https://jecoexports.com/ckfinder/userfiles/files/doxegevuwuzidal.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/76746538007.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/givewunelinelejuvibugoju.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/fejizafir.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/fafoxodibokagaz.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/nozapemav.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/pozaveketuwolepe.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/dedexuxe.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/dugoz.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613a824ea35e0---69669627040.pdfIn PDF document text
    • http://gameometria.com/assets/ckfinder/core/connector/php/uploads/files/97447661564.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/jakijuvojupuwur.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/fojaxijugedo.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/72880142858.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/malipakukarifitete.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a942e865c3---memodowetado.pdfIn PDF document text
    • https://agros.net/uploads/file/ropukisugogebulibexatez.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7cff710f9---34606254314.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210901_1355A3F3E6ABFEB7.pdfIn PDF document text
    • http://totoumi.jp/upload/file/34502166308.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/38201465242.pdfIn PDF document text
    • http://glassick.com/userfiles/file/nutirepetupel.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/62213685063.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sci+android+usb+driverPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD875 10600 bytes
SHA-256: b952030aa5f7461f3fadb2cfd49522cc3a7e42a0b80378153850c050937ead85
font_02_sfnt_off0000f0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 16628 bytes
SHA-256: 35d8e529674e7dfec9d503f3ddb055396e6866534355ef7832d7f227a5e16537

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