Malicious PDF — malware analysis report

Static analysis result for SHA-256 241e0bfa388a8043…

MALICIOUS

PDF

86.4 KB Created: 2021-09-19 17:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0740fc024c7067567b39ba7b0d3b8110 SHA-1: 3825b5ba3db2387708835ca23b40194f9d60b962 SHA-256: 241e0bfa388a804322f7221503614d55b453503661d3e2495d4e40840698db9b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains a deceptive download button and numerous links pointing to external websites, some of which are hosted on compromised WordPress installations or disposable domains. These links likely serve as a lure to download further malicious payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.
  • 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 https://garglob.ru/uplcv?utm_term=sd+as+internal+storage
    • http://permanentnimakeup-brno.cz/userfiles/files/binop.pdf
    • http://logtech.cz/foto/Image/file/45095787655.pdf
    • http://ohana1bbq.com/uploads/files/96837434783.pdf
    • https://inunekocp.jp/mailmagazine/upload/files/92790688476.pdf
    • https://olboihorgaszto.hu/editor_up2/janefuwodinopesoba.pdf
    • http://test-immo.com/file/22017389117.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145d0d650e77---17645068312.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137f2254c720---denalomefejutubojumazozi.pdf
    • http://nusratali.com/userfiles/files/zosajaputazugimil.pdf
    • http://meandnetworking.com/ckfinder/userfiles/files/kakibuniruvaxirevur.pdf
    • https://toskov-yordanov.com/userfiles/file/vupexubebu.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/161428d0975628---ludom.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/113423705d6987f62acb4cc6ac731638/gazupebavazonuk.pdf
    • https://ka-base.no/images_content/file/wituvawaga.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/a944c00dd58a1ccf6261b12d3a58a897/wojekoxenonuxasugutudu.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c36b684ad---sidepemigifikanatezer.pdf
    • http://marymo.ru/uploads/files/tovozokugof.pdf
    • https://goodnest.info/tctt/sites/aaa/file/96573097635.pdf
    • http://madinagirls.com/easydo%20v2.00/files/uploads/nupojogesevub.pdf
    • http://colorfulmedia.de/fotki/fotki/file/52216681145.pdf
    • http://solarexperten.ch/fckeditor/editor/images/file/lagamuturo.pdf
    • https://atlastoursntravels.com/userfiles/file/27986989105.pdf
    • https://samirkumarpaul.com/ckfinder/userfiles/files/45035079580.pdf
    • https://responsible-tourism-alliance.com/content_file/files/megirufefifalomupev.pdf
    • http://mcutech.net/upload/2021/09/file/1631843874607761041.pdf
    • http://apisicul.com/userfiles/files/fogosokig.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2f.bin
b7ebd2af1b512ffb935ab71658728e30f60d331a59f001f604f4b0625b4b1a89
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 10500 bytes
font_01_sfnt_off000102e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 16792 bytes
font_02_sfnt_off00011afb.bin
0764e4f64c32dfe92d8fd137659128e784267c293099743ebf199b6435c78d61
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFB 18516 bytes