Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf751ead163f3c4e…

MALICIOUS

PDF

97.6 KB Created: 2021-06-30 19:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dc2ca940c70777344cb80f0a103e9152 SHA-1: 488b368ff2266e0617d9d8ed7d9b43308bf738d8 SHA-256: cf751ead163f3c4e81ffadf1b0157a1a5ff34c54cd653a599df4219b7bf01952
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also features a link farm pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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.
  • 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://crysiq.ru/uplcv?utm_term=d%26d+thrown+weapons PDF link annotation
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4e80c818b---tuletavol.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/farenupajujuru.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d633cf1d2---20673816665.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/80696442100.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ae2639306---31840599617.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb0afaaf0d---wakibizo.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b7a7d16a7---jivavarojogikimed.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/fa34624128ef5691e23c9266eabf4eef/20804535323.pdfIn PDF document text
    • http://drironcat.com/images/file/lixogamemitenavu.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/26a2e439f624b6c96ef35c2d66529207/96653538114.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/6527443365.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c3fc7e55---60837100062.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608935ae7a317---nijobojamedi.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/029de817811d849485f856f08a805968/xases.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/08e96be15c694fa7814315f8d7a5bea5/buteripomifapezadilu.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/bizinukamosugin.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210617_A92C90290B2B5229.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/bigubifalisu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6v1pbnrh52hdlbl6ig5tc1ic84/67649364624.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/72023576386.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/giremapefadanepikukonif.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0593d4396---sumepas.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/95141451864.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/22050314215.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/92897339654.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/46e2665d47d19e673a07980e3960ea15/lozibufidikov.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607bed9b12dcb---ludakopawetopiwa.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_off00012025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12025 17696 bytes
SHA-256: 44b8a4347e9e48b26c68f52566c633a7fbf8ab5cb21d32eae282a4b22c6790f2
font_01_sfnt_off00014ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EF5 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8
font_02_sfnt_off0001619a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1619A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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