Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce5219e748811f4…

MALICIOUS

PDF

80.8 KB Created: 2021-07-07 12:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8d59690698ec90b468d1d5b93e47227b SHA-1: 7fba1cddc9302e204fd4365695068418ca4d24df SHA-256: 9ce5219e748811f45849c06b4142012c3c2273baa4cc07e46dad4dba7dcd3feb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites and other disposable hosting. These links likely serve as a link farm to redirect users to malicious destinations, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/7a4ea58d8818cb8a9126b476fcf5dc66/57470684035.pdf In PDF document text
    • https://motelandratecuci.ro/userfiles/file/digukafazudijor.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/jelavivodaletizexipusuwik.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/206d3649cba9a0c997a22c009023764e/narepukon.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b246a76ff---88568650657.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/39600431948.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62b01c925c---tunikikejafapowe.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/bedutudupetuxufamigugix.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/51227775176.pdfIn PDF document text
    • http://mega.kz/media/upload/files/3577568940.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16093d132af9d4---43637707496.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/27639190102.pdfIn PDF document text
    • http://slpclassof67.com/clients/45391/File/5874074612.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/62673181637.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aacaab9f9f9---pisawonom.pdfIn PDF document text
    • http://rheumatology.instituteupload/content/file/wufusovapu.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcdeef0c2d---kunudezewidodefizur.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/gaxoxesitunuwapitezizo.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/70274128899.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/gofulogovu.pdfIn PDF document text
    • https://actorconseil.com/files/file/zebapabesepasulofedore.pdfIn PDF document text
    • https://ready4use.ru/uploads/files/84978163470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=chronological+old+testament+reading+planPDF 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_off0000d6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 10992 bytes
SHA-256: 8c2ad5e03fdc4881078e218ca23bb59b70526bdb03a95a5de7ab0bfb7489a251
font_02_sfnt_off000107e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E6 17644 bytes
SHA-256: 4ad3b21c619ac32e03e9d205b3ce24c32ff31514790f8d609b307ffa7772d47f