Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db091d3029f2fed…

MALICIOUS

PDF

83.0 KB Created: 2021-07-20 17:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3edbf93be27c32c7c1cc7cb8a0c09077 SHA-1: c31f4b2ee6f4acff39d3e88926e6509b3f89b391 SHA-256: 2db091d3029f2fed73ddf3ffa565b91cfe7fc8701ff30fa1cacb72a790ac94ca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains embedded JavaScript and a link farm pointing to various compromised websites, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of these elements indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://seednseed.com/admin/fckfiles/file/zifikirab.pdf In PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/kqrvkvlhrgps6k9hr847hl9ptr/66665843061.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/zedemasadakatoduboladow.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/nuxakijitomosafu.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078e8056977d---49498543270.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/tejefatavesodemexirewuj.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/golufarig.pdfIn PDF document text
    • http://bichvan.vn/upload/files/getupesamuwawulekarutosa.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d4a80bd15---mupuvokisakatiwol.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/fipafogulu.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/38648031155.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/3389844727.pdfIn PDF document text
    • http://reikihaus.com/clients/75291/File/1101300409.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/rupigunenurakox.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/53976712206.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/94956477237.pdfIn PDF document text
    • http://canadanur.com/resimler/files/tudumigebisutajigufu.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/17080486472.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/3gk9nit39qupt473vserq1ul57/pasizakamabasaxowakufig.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/30920750887.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/5c78516f2b3ebb942be05efe8b6fcc1d/53903319706.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/8u5lfvemsivehvk147sgtsqkgd/mawewuzamiwol.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16083df06769ae---kedukujewuboxefovev.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/pedadunoboxekupov.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4c8be685ae---38988132441.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=harsh+mohan+practical+book+pdfPDF 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_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 16684 bytes
SHA-256: 5d9d493ae468c5b7cdc3e2827eefe1724438d2cd6d7fc88741a1ac3863ac92da
font_01_sfnt_off00010d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D94 10976 bytes
SHA-256: 937add51b2c29d63e366f456ab44fd3bee70d5cc051ec120ec89585c1a34264e
font_02_sfnt_off00012693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12693 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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