Malicious PDF — malware analysis report

Static analysis result for SHA-256 169ba49111c56abd…

MALICIOUS

PDF

89.8 KB Created: 2021-07-22 15:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a2e047aa541b58737c24332c0063bc50 SHA-1: aefe54b336b704b6aa62843b0f2d880c35437b45 SHA-256: 169ba49111c56abdad78b69b8ec093a2753f4f242eb835f4240200c2205f8631
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, such as http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160785e93e151f---genevelinemijutor.pdf, are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/d58dc20e4c56c7b77f80e425dc90e114/65502677029.pdf In PDF document text
    • http://pttaccounting.com/userfiles/files/gobutux.pdfIn PDF document text
    • https://aneri12.cz/res/file/fizujedefixezidel.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/87098768841.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/46b9ecf03f620ea7eed84f5ce208122c/20195537820.pdfIn PDF document text
    • https://newoptic.mn/uploads/files/81434111995.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/rasazama.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/64760292802.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/givenedakuw.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fffffb76a8---tipubidulotewuduwe.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/pshgpbmkhuu5519beucv09ti4p/67121645348.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088510edffa6---14161139745.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bd0f5392d---reninuwifu.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607aab165d410---bivomulumakowa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28af5efc11---49148387802.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160785e93e151f---genevelinemijutor.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53d4aa0f95---38154075106.pdfIn PDF document text
    • http://biosite.ru/images/news/file/98958231959.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/m4bt6jdf1cegbfkqjfis4obd86/61620505211.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16080f0850e4d1---mepebobubiredoda.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/c3o9drs0ha9kq2r6rpjfbpl0mc/tovowemaxoxumisar.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/fixisadov.pdfIn PDF document text
    • https://mnlex.it/file/laxejeg.pdfIn PDF document text
    • https://mattress-leader.com/media/13266961837.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/f2af8249d5893131cdd4045aef2383cb/42575544629.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=what+requires+an+sdsPDF 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_off0000fdb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB3 17012 bytes
SHA-256: 406cc90933f178daaeefb64200844d8639ff946be77c1bedc24b1d4353a730d2
font_01_sfnt_off00012a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14224 10420 bytes
SHA-256: 3cfd7d16ada88b5ba360e02530c6399025194f9c50ad0439689fead0880d4058