Malicious PDF — malware analysis report

Static analysis result for SHA-256 b240f8d807e64a33…

MALICIOUS

PDF

96.9 KB Created: 2021-08-11 12:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 466dfeeac7e3b0b8d4033b9c2f385594 SHA-1: b78e60ed5135139ae80025d7692ed980feda3d15 SHA-256: b240f8d807e64a33e34308fdada56be4a59617396890dc84fc933134e82c5435
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ellev.fr/upload/files/lazawimik.pdf In PDF document text
    • https://alamansyria.com/userfiles/file/93256234037.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b3c54b8ae---23050689589.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ee0cfn0dacnk5et8smk4234b0h/14979349531.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/3804856d1438b0dc1a8bbc0cd15e2387/vipuza.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/tosonozotu.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/dotulojofudir.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/6528635967.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/bewosana.pdfIn PDF document text
    • https://area5srl.it/file/79465399792.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/6e20c124cc8636642f258ad17d0c2acd/50629343939.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833882cbc03---84952670379.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/gilekegazu.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/xitogidipemotad.pdfIn PDF document text
    • http://scottleddy.net/clients/862555/File/nojepol.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o4ch3jpu6bpbln1ck3s750uu73/34440043731.pdfIn PDF document text
    • https://hirurgija.me//files/22025822742.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/gusodazewebut.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52ea81b095---7244378655.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/7472cdfc3301d6e150b2c7b175cd0ce9/85460160331.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/97512616718.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/7119287931.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab15e24328---zipewakedigiminumefag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+reset+limit+switch+on+trane+furnacePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED7 16480 bytes
SHA-256: c8228178d609710d2a119d767aa30fcd40f93ecfeb223f9bb4af49d353e974aa
font_01_sfnt_off000115bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BF 10780 bytes
SHA-256: 639cc16295323d331f6404098dc9870ee3d799402b7c229f3ef4f0750920cc5b
font_02_sfnt_off00012e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001467f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1467F 16720 bytes
SHA-256: b39f4ae28a2f7af676970d5482064d691bc708f72a21df04470360601d574291

Open this report in the interactive analyzer, or submit your own file for analysis.