Malicious PDF — malware analysis report

Static analysis result for SHA-256 41fd498915af2727…

MALICIOUS

PDF

74.0 KB Created: 2021-07-13 20:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d3ec7015c4881232acf80b2cdb7b3154 SHA-1: eb5a6e084f768dd092d7b10f9d4f8b10511b943d SHA-256: 41fd498915af2727558c3c17123e402bf9a70de16ae2485f130dd62564b035fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm used to distribute malicious content or phish users. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://canionglobal.com/FCKeditor/file/duxefa.pdf In PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/2240bfff33c60d9c5caca4becaca49eb/91584975100.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/bisidodimisopijom.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/84379771049.pdfIn PDF document text
    • https://zzhqhi.com/d/files/xupelaru.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/23f8c466ee5555fef73b9b44b2fbe7eb/95648090683.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aa96d1f2833---xerililosomufigoxemeli.pdfIn PDF document text
    • http://ysenb.kr/board/file/editor/file/24570169071.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28c088aaf7---mesapobapetulawuseba.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/pixodepovuginawupet.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/52031096521.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607629dba813c---15633411085.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202106010549145401.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/nipunitijurateza.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/79340953007.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f74d1a622---milerejelez.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/a9ecebaf5e0d047bd8de607919d9e449/64421302185.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/5212ab86513e94af4d3641135c9de797/39057149240.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/jokawinazomoxopinojo.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/22736673583.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/38625544768.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/d937f4293672208f2118aa651d38bf05/regezagexo.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd7ec8cba6---82378826980.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befd1208ba1---16322837864.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/8df1ccd47523af2bce774f3fee810870/jezeva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=standard+form+and+classifying+polynomialsPDF 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_off0000bf53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF53 16052 bytes
SHA-256: e5596c1e27e1be4adeaf930a1c6c45ec090927f1923341028e96239841accb74
font_01_sfnt_off0000e913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE913 11020 bytes
SHA-256: 4b78d6f26d9aa42af3c8bbdaee533a919b00d2afe56e72b2cdd4d03e25df4f0b
font_02_sfnt_off00010279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10279 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1