Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe11fd59dee5caa…

MALICIOUS

PDF

84.4 KB Created: 2021-07-15 10:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3647a0f5532ae87815e8b0f76d2b248c SHA-1: 4a124490ea2ba377f5f6615d1ae32e25a2f76f3f SHA-256: 6fe11fd59dee5caa321ef57da03fb23d59da07526dd43d087601a663e00ae735
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links likely serve as a lure to redirect users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/ea083d4989629c280c4bcf5e5e1d245c/nanopubapuvoz.pdf In PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/9f06a2f49a7fa9201c987521e04f2781/39738334618.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ced18580073---74952775797.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a735b43cf83---xikek.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/sunatogewiferefisup.pdfIn PDF document text
    • http://omg50yrs.com/clients/6/6d/6dc66c997efb3e4e8ce6e6e7d0694e91/File/96311743919.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/tunutes.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/amfrjnojr5nspmbsejlefavdqu/91028878599.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f789aea46---27846974768.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/33520ea16ede14a773a832aabb441c86/95907298012.pdfIn PDF document text
    • http://upbfassadenbau.com/upload/file/78405132283.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/88474497339.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/muvelekefijufebudogu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/de755d0b7054e9651f4847954365737d/tiwikejijis.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///92313133323.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/27382552671.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/33948004836.pdfIn PDF document text
    • https://spacio.hk/attachment/file/46189581954.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/57331475326.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/07/14/file/lovuliwulisujed.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/vajukidudaxu.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9014321609---vukexolemu.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021052518161452.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/73815236348.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=boy+names+starting+with+r+christianPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE791 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA3 16764 bytes
SHA-256: e0d4773508f1ff5f3049b0c71a026984c86b831e1456b69f9265b7a196dd79a8
font_02_sfnt_off00012b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2A 10884 bytes
SHA-256: d32a458372a5e9b8cc10351ae5a96c3cbfbfc9d69ef54a97aba554252e8baa30

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