Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9026cfa09b375d…

MALICIOUS

PDF

78.1 KB Created: 2021-09-04 06:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 83636628bdbce7cfecd9124097e15fda SHA-1: 88d735fcc9fd2a46259d7fcbd4ba76b9cfa10a48 SHA-256: 9d9026cfa09b375d911c8608143d63e0355cd85ae6d854bea829435ee8d5cacf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to various domains, many of which are identified as compromised CMS uploads or hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves luring users to click on these links, which is consistent with a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • 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.
  • 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://maskaevlawyer.ru/userfiles/file/xirukuvasafe.pdf In PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210705_E93485D946FD77B4.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c6732ebf369---zekedivadakawapuwozeronux.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16074810459972---56991219331.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/d4222b43fad5a37b2cd272fad159021c/88554129907.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/pokojalunagimazuzu.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/19805665741.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/duzuxavowa.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/pdl8lhl50u5erok2jc9g92fudq/vadetetunibubiv.pdfIn PDF document text
    • http://hpc1970reunion.com/clients/3/3e/3eb4c5728feca7eb79feed4eed44c519/File/14590474117.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/bepumu.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/463ab4e49fec4f58079b4b28e2ee6816/15967607083.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/ua38rctjub6djam13hin8ilaal/tomulamokerozu.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/10411450567.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/vobexenizofotus.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/munarukegiba.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791a4f41451---6462035897.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/ribixavid.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/qukk5pjas4hv3395us0p867cp7/66379472745.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/dixobo.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/siripo.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/74189602693.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/7766645619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=an+introduction+to+distributed+optical+fibre+sensors+pdfPDF 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_off0000ce13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62A 10836 bytes
SHA-256: 416ad4717d3c0c06ef19fe37cb501aa8bb7ce33379f3e4283f79168d182e2c71
font_02_sfnt_off0000ff1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1D 16832 bytes
SHA-256: e92d514264d199ad19bd9641ce220f3bbfb6973396438cd5c6d0f6aae39c26e0

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