Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c323a932d467682…

MALICIOUS

PDF

70.3 KB Created: 2021-08-12 04:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6f8af2b02251cc8939867432a75192a6 SHA-1: a8822d0b405ebea942c50f4ece13d750cee29b55 SHA-256: 5c323a932d4676823e7a4a128781856ff5e56d0bb5895d6e1208b5d52b089a5a
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links pointing to potentially compromised or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt at SEO poisoning or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9809

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 http://spc1991.com/ckfinder/userfiles/files/nebegebuvojuzilupuwe.pdf In PDF document text
    • http://alhouti.com/userfiles/file/figovifajufudojevad.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/nitavunikopifeviniruz.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/f2cs260qseiktrj8p3io7qho85/monemetefas.pdfIn PDF document text
    • http://sivam.pl/files/file/82332563163.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21ba3a9225---36823211825.pdfIn PDF document text
    • http://thaide.org/userfiles/file/lusomegakulizibad.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/17067384853.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/tuvodisulupi.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1607014429e029---99956996689.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/84738233375.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/pusaxadigite.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/38886908335.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/f3bf87ffa36a58ffab7109c6ac793240/73543607740.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/jetonilozo.pdfIn PDF document text
    • http://isvpro.com/custom/files/guwebabavomofiwuvota.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e31a8b77f---danudelujevosaxetimifit.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/8927588703f1793455f8287e6f025fd5/22696578190.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/29847653998.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/2fcca23548f7a7de0b63f633e33d85d9/kelareteworuloto.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/f5dd47ff0a2559c76a0722253228f45f/jidulaxuv.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/fenibenijepifubelimuzul.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/e279288b78856f9094c1433e3bfeb8fd/67782964869.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/ketezumiwaximaxurudagalu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=glencoe+physical+science+chapter+14+review+answersPDF 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_off0000c2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DD 15548 bytes
SHA-256: f9e322c54d175495236b02e206c65236aff30aac24cdeee83c0d41e9741b29ff
font_01_sfnt_off0000ea90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A7 10908 bytes
SHA-256: 90f3045185c0fa11adbce4d0ead76b7ab8953431153162cec9f9eb9167fb2b9f