Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f2647f41883c66…

MALICIOUS

PDF

81.4 KB Created: 2021-09-06 05:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ecf71849c6ea2f6528b3de8eb3cbb80b SHA-1: c310e7cfad8179665ba4a51fa3df49d70944900e SHA-256: e6f2647f41883c6629ea58d1e45036b6b1d2b1207a9e7eace58af2d35609f366
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. The file functions as a link farm, with numerous embedded URLs pointing to external sites, some of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://queure.ru/uplcv?utm_term=catalogo+eudora+pdf PDF link annotation
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/g9l81mvupe3e06b5sqaiaseahd/silowufarozu.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/dawuzulawikipidule.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/23044443060.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/546159baf02845d47282faed3f2582b9/9764575647.pdfIn PDF document text
    • https://sce.tw/uploads/files/60bfbc22e2e2f.pdfIn PDF document text
    • https://tekmaker.com/upload/files/jepojudupokinosemimobi.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9d743d83c---gopovagigurisinadulukaw.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d39d9cab9---naxufadijenuriwapaligu.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/88987545023.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/80696170556.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/75f96a0f75538b2e11401b89e54e9628/fubasetejom.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/57684130552.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117db2a5bd7d---39376982898.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609a32381313b---83008601940.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/31886473981.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094469917ee5---jejozenuzo.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/6487211523.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/11878517388.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/94858591136.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/ar242fdv8tcgp20t5oaaq5gqh7/nabexenubo.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/wawuxufevevarapog.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/kumanifemarizojevipefemuk.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/namebupijulakagolanapo.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/57226563476.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/23603729917.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_off0000d6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AF 19172 bytes
SHA-256: 83bae004262f92ef22515de701fad65e4326f5a2cdd0b551dd0cead11b9a32df
font_01_sfnt_off000108aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C1 10440 bytes
SHA-256: fa22d32d943aaa8ad19672a80231d6b75da7c1b87c15d58409c76da1d70bd01f

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