Malicious PDF — malware analysis report

Static analysis result for SHA-256 1edbf5d427d8a23d…

MALICIOUS

PDF

129.4 KB Created: 2021-09-03 15:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e3e3edfb5a86d6518c19b1c4edfb259c SHA-1: 7bd0c8fd7106d82068a4d606c6b336ac238cea3e SHA-256: 1edbf5d427d8a23dd886847e0227194bc81fc85a1ab96bca4eb048707a12d214
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. Additionally, numerous external URLs were found, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://archism.ru/uplcv?utm_term=frambesia+con+paso+de+cangrejo+pdf PDF link annotation
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b04ec2b34db---76228960294.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/jenidijim.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/2745425989.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210806_062407.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa762cb1908---zujuwakef.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/d1rnanpihk42b03j1jgj5gji7j/fuwev.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608178564f73c---tinufotobotuneka.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/mejejowive.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7cb61d930---sakilugusetawuberu.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/08eacabd093bfcbf15061882677349dd/81327337622.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/cac2144b1880883a5181dc875a2d4c52/9026069117.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/17612818163.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/fixifojiputete.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/povhv9a9rs11kq0lcfa6c9l9ic/getatufoxoxuwixakosuko.pdfIn PDF document text
    • http://moje-stranky.eu/userfiles/file/53736251847.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/q9odk6qpcdh352ch1nqthvi4vf/bilunetewazaronelufejutep.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/66279179957.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/28294965753.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/39155042680.pdfIn PDF document text
    • http://hasyo.net/files/file/xuxozafuzu.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/62108380548.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/46884902888.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b321f8c791---dimudurow.pdfIn PDF document text
    • http://rcot.org/userfiles/file/fuxotemomo.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_off00018cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CB6 11068 bytes
SHA-256: 126709c08bfb4e4abaece504a39d4a12156d2b8e2644ea2105e57c5d755d96e4
font_01_sfnt_off0001a5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001be10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE10 22948 bytes
SHA-256: 5be9db3d2ee1f4eecbf07167d05569dab4d8fa844479112accf49614e8b50a51

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