Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefd8c29c6c3427a…

MALICIOUS

PDF

86.6 KB Created: 2021-08-18 23:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 93c062efeaeb860d1982df2a763b49a1 SHA-1: 262959852baf2cc3266e59075c6e4b62f506460d SHA-256: fefd8c29c6c3427a0176704fa280ab0acce0b5be2e433209532275dfd6903aa1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://cuatudongnhatrang.com/uploads/files/masobewexogawowenokivov.pdf In PDF document text
    • http://hurtglass.pl/upload/file/91153824028.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/tefofil.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/88840854685.pdfIn PDF document text
    • http://nlureunion.com/clients/33063/File/51994187633.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609acea203956---63981016160.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8cbc6ea2a4---79360062147.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd50f3687f---16346099238.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/e5d2888799f24a28c05a4038093943d5/menojanomorosuwekezukukix.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b490a861d9---40310869165.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/18404981950.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/fpu1vb6ppf08mko6qc8dfdrnl4/zanopewezadafazizub.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/25159281440.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160756ea83264d---lopuvagimesexoruxisofefap.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/48090044861.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775286ea9b4---sowunugijimiwumob.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/u2snno8bmbrtvej82r8equp8h3/mejutetejapulalagituzuvaf.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/49829096750.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f33e4d2d41---81448794046.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607885c6b7476---nirivazel.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c687e268201---69362915446.pdfIn PDF document text
    • http://redsky.tv/userfiles/files/zukepovoxanalibijefon.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/bewesipezulip.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/74515237589.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=chaar+sahibzaade+2+full+movie+download+in+punjabi+movies+counterPDF 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_off0000e88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88B 11616 bytes
SHA-256: dace39a8c0467ed9b191576446aa72a6f24bbb0ac706a06d0187d2949a26e0fa
font_01_sfnt_off000103e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E0 18188 bytes
SHA-256: 79d834225f54f73cd1750b96c132afd64a08ef8f5c0ec8e0e0882d60f11287ee
font_02_sfnt_off00013345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13345 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1