Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da9a634aedd9c62…

MALICIOUS

PDF

75.1 KB Created: 2021-09-02 15:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 92afd0aca5c05edab37ab9ffa4892345 SHA-1: 54ae18d0912df1635d31984fbd5ad6bcb41a4be4 SHA-256: 9da9a634aedd9c623a02c95d4a8b6df0b57cebb9d45c64a81c5e281a862f1542
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or redirection scheme. ClamAV detection and ML classification strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the link farm structure is a common tactic for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a7f37dfd8---fenoz.pdf In PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb56e1a09d5---fosolerapadinetidivufa.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160f58fc8334fc---23685510192.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/52903948202.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/8c1da6fc76515500e457733c6650ae3c/52137482972.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/60783968828.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/9294f1906c46f9ae2941bcefe7a54475/wimupadevika.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/4527943057.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/94749807135.pdfIn PDF document text
    • https://s-h.cc/uploads//files/202108020253477363.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/woluxawo.pdfIn PDF document text
    • https://dhesient.com/media/bokalopagogesuviv.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • http://rzn-house.ru/upload/file/49540747614.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb51a307e29---wawasuvonifekisizukagazi.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/fumuwobolaberudiximutuzub.pdfIn PDF document text
    • https://qeyeoptical.com/ckeditor/ckfinder/userfiles/files/74330145951.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/62301675140.pdfIn PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/lnh0t4g7jladiejd5106l5u6ds/12373644522.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/sepojaganefezugolitagavid.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/qqavggcol84sslrkh1f36hjfff/bebabibet.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/38639093888.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/bavumurakevemojutegisa.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/nuxunob.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/voxelawabefaposipu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ulama+ki+fazilat+pdfPDF 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_off0000be40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE40 10192 bytes
SHA-256: cc4c9a80e96fb7a5112adf719b981aa37c4e35cf82f223dea60f9c6149bf0806
font_01_sfnt_off0000d510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD510 18680 bytes
SHA-256: a01ef0203b84bb5d0181dc6f79dcbfecf4dddc6acc853919abbfc739cb3f13b3
font_02_sfnt_off00010570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10570 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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