Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13f0a8198e61276…

MALICIOUS

PDF

85.9 KB Created: 2021-09-01 13:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 065329be8cdaca01bddfab6a9501527f SHA-1: f318e4ce954103b3021cece70ab7acc0c33b2ca2 SHA-256: e13f0a8198e612763d350f1c67b26164e0a9551858c868fc17a4e397b9c1c454
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous PDF link farm URLs suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9361

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://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

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