Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb082b7fec73e2c…

MALICIOUS

PDF

65.4 KB Created: 2021-06-28 20:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 174d5447972e8f4a474cad4ea99c3a8b SHA-1: c16919316ccc0336ce1a31d5c619536bc3368d59 SHA-256: 2bb082b7fec73e2c57b2fc65f95b6cfc4cd3dc5562802a7a700bd82da9a4e8db
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5448

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 https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/dd571eba88cd20ed2226c67f24a585bf/51248041337.pdf In PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/00920d93e61deb49cf2a1425e4f7f3d4/78761630553.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d8008928c---sexonetizarigo.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a4fe952a4---debemibenutunimik.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/bsiplipccv7857lmq9a4g1i9p4/taradijanoxusojo.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/gavuzisuwotesavubezijuke.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/3400087947.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/nidapixujuvagukuvin.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de75d89722---92552936682.pdfIn PDF document text
    • http://zuche0551.com/upload/file/41316485068.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac2b661c23---xutog.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/ovliv8dnpfjeqhmh9qjljg9t42/63974343328.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/8a7326fe3748ed9d44c9acbc21e9b344/pekegiwixopajeribawidi.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/84769318350.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cc5c08c65---muwutabilekopu.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160961de095d9b---26877627693.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/31177401696.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/pewiwajodukarof.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/munase.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/mutitowalax.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c59d8496a3c---fefozufosawopowideje.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/p3o4phr4onhebii1014b9s3450/jugubififujazasawuvawora.pdfIn PDF document text
    • http://sdds.be/userfiles/file/duxemuvivegorubekivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+draw+a+minecraft+girlPDF 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_off0000bd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD35 10728 bytes
SHA-256: 61b76f4b55b6434ca465d8ee4643c669ec6540c0549c5cc761891a23fdf7f007
font_01_sfnt_off0000d59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1