Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeda42b15c0011b8…

MALICIOUS

PDF

89.3 KB Created: 2021-09-06 04:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d620bbbf0048e28ca640e817920eb526 SHA-1: 3bd0d47cc062c424d2c4af4c62e50f878a3dd69f SHA-256: eeda42b15c0011b80cbff5014ad8e385ca935f93a6e1bae7ec7f20ac7192680c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URIs pointing to compromised WordPress sites and disposable hosting, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself is used to host and link to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://catamma.ru/uplcv?utm_term=bardentreffen+2019+programm+pdf PDF link annotation
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c03330f9ef---jonaxeroxiji.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a36389b6b60---vekawedizomofukovezutesi.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/96687994097.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/85449336128.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c544c98f6aa---remifosakubeb.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/rarakasunefop.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/laxef.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160915c46844da---jinokuk.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/19871504560.pdfIn PDF document text
    • https://signika.pl/Upload/file/14051683111.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/54715549353.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/ed4fe06f8339c50dd54eaf71bcfd1df2/85729416885.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/52242128566.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/dagopewat.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f3527d210---weluzav.pdfPDF link annotation
    • http://taihegas.com/filespath/files/20210812114337.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160abfbd11c027---gifopuzaboniruvanerag.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/25161594773.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/be877fb92cb6dc505cdf016864012a2f/jutozutani.pdfIn PDF document text
    • https://samowar.me/upload/file/78721020975.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/fd3a3fa5d6480cd31f8eed1364c914d5/75605821714.pdfIn PDF document text
    • https://ancoraeducacion.com/images/973709244.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/godabapowofugudijim.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/zazeditenidaz.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/3cupkn5cnifvhgqoa4u65paa9v/8319448268.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_off0000e9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B0 23312 bytes
SHA-256: 36d8458cabbee363257290aebc74da96fe7d76eb500222dc1a3557036039311e
font_01_sfnt_off00012460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12460 11052 bytes
SHA-256: 97a092307ab1e2ea46481ba79206bdbc71331039e964532d3d16a2d2bf70dcef
font_02_sfnt_off00013df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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