Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67c95105dea2c4d…

MALICIOUS

PDF

73.0 KB Created: 2021-09-01 21:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 52d3cf61e787ce71b5aaf400fc1df6fe SHA-1: 117d4c25976a9e7cd013bb98f0207c31cca2120a SHA-256: b67c95105dea2c4d6cd022c60df47ce9f02d7b86eb451461ffb047491828847c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with numerous external URIs pointing to potentially compromised WordPress uploads and disposable hosting. The embedded URLs suggest the document's purpose is to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://cructi.ru/uplcv?utm_term=abraham+intercedes+for+lot PDF link annotation
    • http://bualuang101.com/backoffice/upload/files/6563775844.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/xoxavod.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/84772442284.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vodepega.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/ruzufo.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/xotuzoxufagom.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/f195ef4ad973ee160005897ba51f5215/nipoxumagovozineladefajot.pdfIn PDF document text
    • https://ladangmimpi2.com/contents//files/lezijatube.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/gokagega.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/d865736119a7c6293e261df5adda5139/fumanixedigudus.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/zutejesawofijilibefedewuj.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/48671838127.pdfIn PDF document text
    • http://contelex.it/userfiles/files/72108285895.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c1951432f---pokujidufukaxuv.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/wepelejevunuduvolojed.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe53041cb5---pefejutejekapafidowija.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec3f8474ac---79388610351.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/q8ktshi3crf7bp4rq49p57ifj0/42711964606.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/merewalamanaxog.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021761856501973.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/gumeguxatureje.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089af533e887---48913651471.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/devarosirusotexabu.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/lozidabisigakafeve.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_off0000bab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D0 10864 bytes
SHA-256: 18c822199a51f7520b69a347e31c9d8c1c1057029cb899166654886cbd7b769d
font_02_sfnt_off0000ebbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBD 16680 bytes
SHA-256: 4a26a032877cb44477a0f1864d717c563de6c8cafa1a722c8ca752b6d5cf93cb

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