Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e3f2857f375f27…

MALICIOUS

PDF

82.2 KB Created: 2021-07-15 10:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 25a015ec045632dcb77e2c6c5d3d095e SHA-1: e3ece649f979cbea214b0ba809961b828d2a23be SHA-256: 09e3f2857f375f2759be5c8f062f2ab6eb7e4211c662e50b0cba48c13836894a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a large number of external links. Many of these links point to compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or exploits vulnerabilities, contributing to the phishing and trojan detection by ClamAV.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://garglob.ru/uplcv?utm_term=what+does+hu+mean PDF link annotation
    • https://nikoljski.com/ckfinder/userfiles/files/bovekuwupapomamawawomaz.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/80269076605.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab29468b6c---leseboveluf.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160774bab585fa---mozuwurelotolamaja.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/xuzikibu.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d847375bf---21677396264.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/t75bp2b2gc19gih1k6llenv8lc/14392082483.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/73326395088.pdfIn PDF document text
    • http://skincarebylaura.com/clients/862251/File/25670875597.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958bf52e743---20527457172.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/59838648933.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/5591348472.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///99066122512.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/gitibidogekoxexapedod.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/1p1v1fucfa9b2nbn8li8l2fd96/kibusujobo.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5faec70e57---55037277916.pdfIn PDF document text
    • http://envigest.cz/upload/file/42441774105.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1f322e77---40883911151.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/hb9hqv1shajbd1g39lb36tj5e5/fugosu.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/82672525125.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9cec2e598f8333fe289ff30341f5e1e6/91858358998.pdfIn PDF document text
    • http://buildinggodskingdom.com/webcms/file/49743410940.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/074c73c8c40d9c27b4674d582ff7c6e8/10742927227.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086638ef13f9---8162984328.pdfIn PDF document text
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210704061628.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210605140103513.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/g4t9rr4sf65ttgqacjm59a4897/46617935879.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_off0000dd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 17800 bytes
SHA-256: bf1268e37303ab9bb2d9208cfe4195185c51ba524baf675bb4dd4d04b100c375
font_01_sfnt_off00010c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12430 10368 bytes
SHA-256: 072ee96718b83c40fc5c0c4a8a2e7bbeb0ae6ab1d8e4635dafc0c7e4907ba714