Malicious PDF — malware analysis report

Static analysis result for SHA-256 30232a9925b6a985…

MALICIOUS

PDF

114.6 KB Created: 2021-06-25 13:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cccb06bda3c7fd66b0e67aa07b0560d0 SHA-1: 25a519e429a4423c6aede018037a96d62c404394 SHA-256: 30232a9925b6a9858eee114cec4bc47cbc866b753ab64ccf88562c7801c89ecf
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/70d32317fdf733d018f14c47cb691189/banumudifidogomawagu.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/26715493488.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/korosuzatudejolabifokuk.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/7130d3b4b767b1104c26def9c5c8cd04/xetukemumetajexadara.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/38678298905.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7188bb6469---novat.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/abda9e8fc8befe0def14bfc136687ba9/mefipanexosaduvijonaxa.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/051cdbf18009c55b68293f515018032f/31662941991.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca2bb7126f3---misigufirapavozalado.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/15206902683.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737887845fe---71908172443.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/69386605539.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/solobuzejikevatolep.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/53235581270.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb8522a118---pugezulotunalawokelas.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16097dcf06fb8a---mexamodaronezewi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=chicago+technical+seo+consultantPDF 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_off00015f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F4E 10540 bytes
SHA-256: 7256f40083e5304fad19b83985d163d13542b693ba578fb2dd874b26164f48a1
font_01_sfnt_off00017759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17759 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F6B 17060 bytes
SHA-256: f576ceefef6e83b706dd11c436f5787095a8c42bb66f4b9f98a21d245efe8800