Malicious PDF — malware analysis report

Static analysis result for SHA-256 9205365721911a9e…

MALICIOUS

PDF

68.4 KB Created: 2021-09-10 16:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 78aa95392bc78fc9432982bb8edf575f SHA-1: dd70d6dee5a4a02ee550e9ac3cfcb82eecbb030a SHA-256: 9205365721911a9e4b08c348db5402b2b6d081176efbc7845cd5197ea29d5713
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=youtube+premium+download+android PDF link annotation
    • https://adikkeempat.com/contents/files/72357188654.pdfIn PDF document text
    • https://menu2uplus.com/images/file/53682266746.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/pupafesapotimumiwatad.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/magiviwomi.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/94512737458.pdfIn PDF document text
    • http://sinners-party.de/media/file/53277929772.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/burawemiropubusuxo.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb37e5c193---18582373418.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/gizadurajomesin.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/27096643275.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/gakiravaxusuj.pdfIn PDF document text
    • https://laps.pl/userfiles/file/4775913174.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/lizofefasefesilemaf.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/latujejaw.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/48608727315.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/sasijeri.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/7857872238.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/48192356201.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/d0fh8tjgmckfn3hvkkt5ft4jf0/zubazemo.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16135daa32a9c0---32433329369.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109040307312031.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/tusokosuzebugufele.pdfIn PDF document text
    • http://novichiha.ru/pic/file/bojipigite.pdfIn PDF document text
    • http://vividconcept.in/userfiles/file/nivunopoworevoxafugiboma.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_off0000afdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDD 10692 bytes
SHA-256: 0d5d55befea3b91cf0d4743d0ffe872446a61820aaa7354ec83109a1458924ba
font_01_sfnt_off0000c81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81E 14332 bytes
SHA-256: ad085a1db5a756c1590a04f8aef58b3798042f3f2fa8d63abdeb276993276e23
font_02_sfnt_off0000ebfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1