Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee26fb225da5328a…

MALICIOUS

PDF

69.0 KB Created: 2021-09-26 00:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bfa1a4ec77fb8940d2f1fb24d6615037 SHA-1: ca9442c27638fc671080ecdc0fe66c6d4d9dcd74 SHA-256: ee26fb225da5328a636bd8065860f203723d9b7dc7b839379e8afe1a077bde35
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document used as an initial lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://yanartextil.com/firma/files/78584337981.pdf In PDF document text
    • http://gayaarchi.com/userfiles/file/20210910124959.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/23575446602.pdfIn PDF document text
    • https://yenicekentkaplicasi.com/userfiles/file/79329927778.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/jadanekilipimudek.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/wavazumetidezebuz.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/pemijer.pdfIn PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/87263754305.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/gevufozopikag.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/17561862317.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/45063477082.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161497482bacb0---datezuge.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/90750785875.pdfIn PDF document text
    • http://cortocircuito.trialpanel.com/images/Upload/files/tuvusotadoguxanalatuji.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/tobujuno.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/mabesukum.pdfIn PDF document text
    • http://grossbuch.com/upload/file/bozefiteperozefezoro.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/37578899736.pdfIn PDF document text
    • http://youngdongtec.com/userfiles/file/tixutixolufilapaxal.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/2a93389ff65c453614e3eed47fd5fc8c/17497366444.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2043b7f61---68925587359.pdfIn PDF document text
    • http://brukbet.com/user_images/file/39663489215.pdfIn PDF document text
    • http://parentini.it/userfiles/files/53906401735.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=android+9.0+emulator+for+pcPDF 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_off0000ad9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD9E 11052 bytes
SHA-256: f6a5bbd63929abeb6a8c1c8428f7f34c5378ffb431e7b685774e7d4589330060
font_01_sfnt_off0000c750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC750 15456 bytes
SHA-256: 922f6016fe43ac8aa70565bc1c69cd3993b8cd063d4e6f2147574c36392d8f93
font_02_sfnt_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1