Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a88c7511da4cff…

MALICIOUS

PDF

70.7 KB Created: 2021-09-05 07:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6715a2a2567e679cd6c7e8c2438d8bde SHA-1: 62518896abc6a4e8676c7182dce5bd5a83cf0c20 SHA-256: 07a88c7511da4cffa68c29eb6da048a7b0c58859c51a7b29af2b72329247efc8
124 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress installations and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4326

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612efea166b52---karujojewipap.pdf In PDF document text
    • https://ferropula.hr/files/bozukazanosisojore.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/mojoxukewexunukaz.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/41e8717faba2312e6423b5cf368ec818/51842372972.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/damirati.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/zeribowozil.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/182aa55a1b58296a834fc9b74a211832/kafidelelarimovemasiles.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e26357a85---perigaluzisomugo.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/2036763377.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/jodavunujifumijurep.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085dbd78683b---xevevadifowenuzu.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0321cd5dc0---59102505450.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/53277894983.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/86231162620.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/tesumivose.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c163d2074ae---82658997499.pdfIn PDF document text
    • http://sayarbobinaj.com/file/lakuwosabinalapowoxaber.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/5763716700.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/17437484748.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/44809106540.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/09021a8d7cb007bd5f264b1d2a4cd4dc/ketadixagexifigeke.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/jibazetomajimo.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d245004872---41785836577.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=reinforcing+steel+types+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/352b369e9e498fefb60c3d6212a6d912/96367335140.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_off0000ce79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE79 10792 bytes
SHA-256: 6e26f0c54b1193a3602772eb0394c517bf07ad841f0fea056f3c5c887393eb4a
font_01_sfnt_off0000e740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE740 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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