Malicious PDF — malware analysis report

Static analysis result for SHA-256 022f2b28cfd9219f…

MALICIOUS

PDF

91.7 KB Created: 2021-07-08 08:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 333c972287840940846e6e73c597f2dd SHA-1: 1a4570426a0f9c1487bc83ad512427fc5821fdfd SHA-256: 022f2b28cfd9219f04442c4265a3608325b4b8601633f68f65c4077a918afdfa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • 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
  • 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://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/29d727570d65562333afade17905dd40/seduwa.pdf In PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/moxojap.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160744af5759e4---fefelovit.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/wivax.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/a2s7kva0n6jbt6copq1b18aa8r/sodoba.pdfIn PDF document text
    • http://vo23.ru/upload/file/53092406974.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16087b47dc6cc6---rixeje.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160844b333deed---lemuxajivojevojasanokafi.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b67aade1d6d---22125841390.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ffc5a4160---70101372099.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/9ed02453fff884f6e7201f48f6c7228e/nukumasogudelumisafe.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/m0ntaj17pdv6o02n5d8p9f9tm7/simunenif.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/131c3931242390f5ab96ee6d2f475aa6/74323781721.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/28890326122.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/82861472858.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/bdc5c65581556393cebcf8682a0f994a/xatezijoro.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/48eniqaoa22u6v2qna73e9096j/55513988389.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/34561498836.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/2fa164be2bfb2ed89ea95e21c7af6fec/xuzaxoz.pdfIn PDF document text
    • http://drironcat.com/images/file/zasafekibof.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/tb6d9lppql38jkagmm9u4tf345/3420865775.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/55969158810.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e123e7dcf8---20949136249.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/83843574286.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ee22aadbb---kunupufub.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/3786d26a04cad6a0e39c4d7d5ed7a728/59930773921.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/9ecbd48cb48cfa745978e0d8394a0d47/64139009167.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=my+daughter+is+a+lesbianPDF 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_off00010386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10386 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B98 17360 bytes
SHA-256: 8bdad1c9a70e6ac6953d12c004723a0e54288d3ca5cb4d6926f56d03948e5a96
font_02_sfnt_off000148e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E7 10752 bytes
SHA-256: 9ebf7f3bff1de75279a4d4854a7c79bf5655f8c3b5d60f2566d80ef8e95c6423