Malicious PDF — malware analysis report

Static analysis result for SHA-256 282ebc7a096b0264…

MALICIOUS

PDF

69.3 KB Created: 2021-09-29 06:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7de11ac894cfaaa1f855344a4ddda9fb SHA-1: bd8a8085d04ff8dbe0b572e7ceeda055e1d1caf0 SHA-256: 282ebc7a096b026421d28da5ff59677f971b7ca39ea6eb31e98a924dec08fb01
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It functions as a link farm, directing users to numerous external URLs. Several of these URLs point to compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the ultimate destination or leverage compromised infrastructure for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://irlanc.ru/uplcv?utm_term=how+do+you+get+screen+record+on+your+phone PDF link annotation
    • http://opuspointpartner.com/ckfinder/userfiles/files/65666307388.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/rarusavexomojekenu.pdfIn PDF document text
    • https://coombs.gocascadia.com/images/cms/file/wovopoxubexidefex.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/3efe6ac8c92eb5013a546479a1a81a3c/22252941916.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16318315404432.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/27916803857.pdfIn PDF document text
    • https://vanchuyen.pvl-soft.com/site/files/55155512481.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/19417607757.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/85496496836.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/jofevunonevidugezaf.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/dijozarubamafujodumexum.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/fojir.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/garajudodopidunu.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/t2up34icfrj3un6nrmckknnob5/26582848121.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/5644975544.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/lilibazusizigalunejezuzar.pdfIn PDF document text
    • https://hlj-vibration.com/uploads/image/20210904/files/20210904040725.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/65320650296.pdfIn PDF document text
    • https://ksuskalology.com/images/file/88544125587.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/segumopebosawev.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/folifudevizizeridavosesuz.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/veveriv.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/natagimeb.pdfIn PDF document text
    • http://charontrade.hu/data/file/wefakopew.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/fa9b7499df58db974ad53d63f5b5012c/1115075749.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_off0000afcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCF 15304 bytes
SHA-256: bd65ad6507aae38dde579a78280d808c5d30bc2dff89e9f7458758d660a7a976
font_01_sfnt_off0000d69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69B 10784 bytes
SHA-256: 6605b3d4f64db524b630554ede2b27a32b982f4e52db153bc1e100b00917a452
font_02_sfnt_off0000ef35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1