Malicious PDF — malware analysis report

Static analysis result for SHA-256 02db8f7d90e4b2b7…

MALICIOUS

PDF

84.1 KB Created: 2021-07-21 06:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b825e86481cc79a465325aa4b91ebb09 SHA-1: 989e077b460c0662236d01e303bf27657bc23664 SHA-256: 02db8f7d90e4b2b7956baee9226fab7454eeb07987b1bc0fa1c878721ff3151e
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites through these links. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user lures.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/fdebe12909f27bebca9814ea246dc86c/lumitofijudunugupupexunu.pdf In PDF document text
    • http://articolo17.it/siti//usr/foto/files/diwigufatugipuno.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aef1caf77b---rutalegalakizedafepowo.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a48821b44aa---83982072350.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/nofusegeviboradixiveb.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/43059395076.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfec85246e4---97374663120.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fea0ce252f---sokafides.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/qjfsn6qiei5to1fnua9lb3jt7b/kitabedujadibulejinodom.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dde64653c6e---vedozuvijepap.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/mijadutujuwiwad.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/wopufufokob.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/hnsqjt834vrgruvf94lelbppsm/ziduralaxawoxaf.pdfIn PDF document text
    • http://erex.hu/upload/file/11553036136.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/13282582320.pdfIn PDF document text
    • http://uci.ir/userfiles/file/42210750767.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/bb0755c983d185f8466848c2c52d41b6/pabofopubagafasugubegum.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/mu8hoerubq0drer5sg61s4v2e3/vajofagikafamuvifinaxev.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/xelosazenovevepubad.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704871a5694---kawufogotat.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/fifosenezijiluzav.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/gjlkg8iapo37t5qud80r5vvgbp/mejozite.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/92677650403.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/499119713.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bed51de9fc---pazimuwofezemuvafuriliru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=maintenance+chemo+for+stage+4+lung+cancerPDF link annotation
    • 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_off0000fd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11558 17220 bytes
SHA-256: 7f59ce99d023adbcdd573c6299cef181920ac16c4a455da946b55f982fa76f0c