Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf1d89038102aa9…

MALICIOUS

PDF

75.2 KB Created: 2021-09-22 13:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2fe840955b4e0ac1a30bbd813bbb206b SHA-1: 9dcd9a886e8ca509083991a5b46026377e0533ef SHA-256: dcf1d89038102aa9564c9a5b74c521f314c5aac66222d2637d043dd01487d66a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these URLs and the 'link farm' heuristics strongly indicate an attempt to lure victims to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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=soulman+partition+piano+pdf PDF link annotation
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f35f999c56---33858284660.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/b39cb15ec906c880d15f7b5ead0f4196/bozozowabedenevu.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/sinepe.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/ganijutepusowotifunuzo.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/buwuvuretufibiroxagavevi.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/13430616357.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/kovomusalumoxawip.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/zaroliz.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/givolupexin.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/zifafukuvimoxobuxabidamu.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/0204qkva7ht9skvjlvciu9sokc/79946695457.pdfIn PDF document text
    • http://ohdiabo.net/images/ckeditor/files/wekaxep.pdfIn PDF document text
    • http://aotem.com/data/home/qxu1780220113/htdocs/uploadfile/files/65301603702.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/161421b63d4514---tesumikuj.pdfIn PDF document text
    • http://tuzoltosagmihald.hu/userfiles/file/28501094353.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/64046847284.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/xigelopativolakebubapekas.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/27904766953.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/pegakini.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/nidexavixuxazedide.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/57655376332.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/talufogepiruv.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16142b8dee32c9---rezagilademegixubugogifor.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_off0000bf92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A4 18676 bytes
SHA-256: 86b797f91764e6d51eb1609ee1574c0c16a9fbbd9550f7bc002e4d826d3374ac
font_02_sfnt_off00010751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10751 10532 bytes
SHA-256: f68b302cbf44081f3b309c1b5937d1a3f743ca52c3b3996c790fd4a442244073

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