Malicious PDF — malware analysis report

Static analysis result for SHA-256 215c8b3471fcc611…

MALICIOUS

PDF

80.0 KB Created: 2021-09-07 03:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dc15402f9c5d0bc2bf54fc4ca7b9ff01 SHA-1: f432252a893d39d603cfffe034d0dbd32cafef19 SHA-256: 215c8b3471fcc611d6ef67cd0ad1979ba417eac5ce25d7d14bbaaac2ed6326f0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting. The heuristic firings indicate a link farm designed to direct users to potentially malicious content, consistent with phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7162

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=metal+alloys+worksheet PDF link annotation
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/0445d21379e424edd675c4c555268bdc/mupixosuxobigovefose.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608338052dcfb---pesamekoxiwulolenirobe.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/4467d33f1cd2be916bf376a35699174e/jiloraveguxumojekunimosu.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/34861296717.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/folokupogafubavukof.pdfIn PDF document text
    • http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/vetus.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090539abd6ec---saxibekudejifo.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/65216326134.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/16980904448.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/mofuki.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612deea799397---wobuzonuko.pdfIn PDF document text
    • http://wjcopy.com/upload/files/zujigaxugevenoxug.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/sowazisadigixoxezufudof.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/18392109027.pdfIn PDF document text
    • http://compufoxmail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/kedibupupilojokojas.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/kifuxurofoxu.pdfIn PDF document text
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/kebuvotiwul.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/79910821110.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160966da9bb5b4---tekarewafelodixux.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d43e5616b1---41033163184.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d7d3d41ad37---28682745409.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/42ebfb6b9118da181cd14015efcfab96/sabaxolanorofumatifopimis.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/68567775541.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/59101549524.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/0709ccb38f5d5b51563e6e29cd97c8cf/pafakamoxojewunuva.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DA 20892 bytes
SHA-256: 559c217008d906d4343ca90fbcd6dc2aa0b09e4e2f98608c9708b4e572020905
font_01_sfnt_off00011a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A77 10296 bytes
SHA-256: ad86643fb6760452aa478aac827ad2a8322de42c1af7b0587d5e54cc2c64ae5e