Malicious PDF — malware analysis report

Static analysis result for SHA-256 08924f77ac27db72…

MALICIOUS

PDF

75.9 KB Created: 2021-09-02 10:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 89463af9bd7cadc22145c71c9da7bb5a SHA-1: 6aafe41900e8aa379b568017c612f33ad7a5a91e SHA-256: 08924f77ac27db7248a698498ec419fd47317543d71e0cb06a434967e823d845
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://hogozaty.com/ckfinder/userfiles/files/wapovewi.pdf In PDF document text
    • https://xn--mgbaf4adbs1bd2i.net/upload/ckfinder/files/84514520064.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/11136380613.pdfIn PDF document text
    • https://sierrainstruments.cn/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202108/file/19626432166.pdfIn PDF document text
    • http://www.puhito.hu/uploads/wuxufaf.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/9008250199.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/t892qspk0j7ldk5l6h1rin0ta9/wumogudiwabokapuzenerit.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/651ba64f49b96e81d60a274c94de4d0a/91778845255.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/vsfaf30f3i0kuisea3j2en6onl/bevubiwoj.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/0d134ed51d3227920f7c675dc56e3192/sisalazanew.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/16ddh058k2n1ii5nhi6s597576/sobokemoninulomapelowu.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/sawaminuvarukemutufenotal.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/9d5626555629c728cc96b325f1bcba34/suxefafajutevobixusivuze.pdfIn PDF document text
    • http://sitepride.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/81831225165.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799f979af74---dowakutotijuz.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e83190565---bexabenibiwikudix.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb78283513---wukefiburero.pdfIn PDF document text
    • http://www.mousumibanerjee.com/fckimages/file/toxiwulisivukerij.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec504b46bb2---47679547618.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/muzasopijogagenukedorofex.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/netfgbenatfj613gmrqj3np793/mitafegepis.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/xutesuxakunupeja.pdfIn PDF document text
    • https://hostessima.pl/userfiles/file/70306881844.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/83708691372.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/9583b7fd47f014b8cba091a1ecd4eced/59125774106.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c768e65451---zujanubidalezo.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/somodukoxulefatovobabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=annabelle+2014+full+movie+in+tamilPDF 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_off0000c476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC476 16796 bytes
SHA-256: 31b79150e3e4f313a1407885ce465bf0ca6e8441f08b2082899d3e58e6181203
font_01_sfnt_off0000ef8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 10764 bytes
SHA-256: 6a321f75c76380d87b574488c5ba2d2e38d9fe28209aeb69b5bc9332f96231db
font_02_sfnt_off0001087b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.