Malicious PDF — malware analysis report

Static analysis result for SHA-256 09be14e246d71fae…

MALICIOUS

PDF

89.3 KB Created: 2021-09-01 13:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5f8896eaf2371bcc2dc5741c242a23f3 SHA-1: 63ce221d48b7d2877ff8ea3e97617fd455982d94 SHA-256: 09be14e246d71faeacd43b72571d7b0c8b8ae30956919c9ed4f3455cd78d8860
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to facilitate phishing or malware delivery, likely through embedded JavaScript or by redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://ekselantechnology.solutions/ckfinder/userfiles/files/40317355648.pdf In PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b83a71c567---15859263613.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/raguzaz.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/48690293179.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/25/file/20210525_055832_141.pdfIn PDF document text
    • https://quaint-house.com/30371364286.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/25510261154.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d79b6a1a4f---sanirojivupodedogeregadol.pdfIn PDF document text
    • http://www.scsk12.org/policy/files/files/lolupiviborenevaz.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/kumid.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/bt3o7ij25u9gol2n26nqtpcpds/niwosatu.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/bunufutasigemize.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/lunepemimepaserupup.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e7f90b9cd---zifujogemebe.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f571799255---baxamese.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/96073792585.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/69736792233.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096452b23e7b---29996288025.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a71489ddb4b---gajowovugi.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e76508e693---wuxarabigilumavirakiluju.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/jl7gaslv4hnbkd4rs4j3qk66bb/89342066379.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/f609bc93d04ea914cdcec96c56c8a545/fofurukemorazu.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161108d90b2800---nuzitisuxogolor.pdfIn PDF document text
    • http://thevenetianmask.com/clients/71561/File/77135320233.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8eca5c1c1e.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=pdf+show+all+commentsPDF 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_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF6 10636 bytes
SHA-256: 7ecf19d501f8c8ed927267eb57bf1e192b7afb0bda188141c7052883d9fa7053
font_02_sfnt_off0001283d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283D 18040 bytes
SHA-256: de5266669ec8a6f2a5072f67099ea73fed7b8c41f71e14c98d14724173f27690

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