Malicious PDF — malware analysis report

Static analysis result for SHA-256 a412366a62f380b7…

MALICIOUS

PDF

59.6 KB Created: 2021-09-18 14:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0453c7c93471cf2caa351b255f3ee600 SHA-1: adbc9e376e42cf06ff357c04177af0cba7c47765 SHA-256: a412366a62f380b7a005b7a87b977832ec6afbfdc03429a8b07fd2b221c79557
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URIs pointing to potentially compromised websites and disposable hosting. The presence of these links suggests an attempt to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7846

Heuristics 5

  • 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
  • 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://oniceh.ru/uplcv?utm_term=rc+novels+free+download PDF link annotation
    • https://niboparis.com/upload/fckeditor/file/1631890602_1.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/39092938396.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/60612751554.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/farolukopevekunisejuvik.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1614433689bdf3---8723451775.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/70743603888.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/79f0a357e7ba851fbda4c781ec56b41f/62219672857.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141cf10c4149---6207700911.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/81120722032.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/320fc26d244f88f710a023588ff56b02/27920300057.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/ximujenurixojosuto.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109041218015058.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/fomar.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/botonewerosaz.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rezokesinavuwim.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/28635453654.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/rilosinefotiletovamijaz.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/47724858040.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/49373977260.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021091206142773499.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/19157876538.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/nurotiruvefuwixupekibima.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/83014124905.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/82087173239.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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