Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b37462a81b91ac…

MALICIOUS

PDF

86.5 KB Created: 2021-09-13 16:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e29ed39ca88435c019e8a4731646f7d8 SHA-1: 30d7f45039cfeebc52b08231b8cd03669c0330ae SHA-256: 24b37462a81b91ac7c12f6c7a0042fbbe81e50c84b2823f89a28350a9f1d740c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous unknown and potentially compromised websites, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rumulekupagekiso.pdf In PDF document text
    • https://f27szerviz.hu/upload/files/70919991142.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/78847250506.pdfIn PDF document text
    • http://zlzljc.com/uploadfile/file///2021090208465251.pdfIn PDF document text
    • http://marisqueandopremios.com/campannas/file/xekojusavekupumimulorar.pdfIn PDF document text
    • http://shop-exclusive.cz/userfiles/file/pamatawadujirasabobepiguk.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/37712581241.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/f8e41a26d98b220fa6f65276cb352049/83743171818.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/22853210984.pdfIn PDF document text
    • https://istanajp2.com/contents/files/disiledu.pdfIn PDF document text
    • http://hospitalityroyal.com/upload_files/file/tezenekotebuvixamap.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4b46ecfe60b851835a893dd8ae880f38/wetifikutijuzijatewev.pdfIn PDF document text
    • https://majubesar.info/contents/files/purexisipazugine.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kodumexojutegavoperibiti.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/15908515523.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/24282625647.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/fotuwukovev.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/2249722251.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/64212142090.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138e087b1111---vawolodaluwinetur.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/53586388745.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/8a0de8de893210a483850f20835a42ce/vudepof.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/73185425213.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=psn+ip+grabber+androidPDF 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_off0000ea59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA59 19404 bytes
SHA-256: c853e2e8c6927947a09066cc60fa466faeed0dbfe6ab9a8ca17dd500cddff5b0
font_01_sfnt_off00011d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13564 10564 bytes
SHA-256: a1bceffd09721ce4f281ae7b5812383e5dd0793434926f37b8d7b85fb7de22ad