Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69d47f9a6209c92…

MALICIOUS

PDF

87.6 KB Created: 2021-09-08 06:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: be20502fb185bab6182093dd80ea5e63 SHA-1: c3e81853c9ef9e958b0b5e80a5c2a24acdff5389 SHA-256: c69d47f9a6209c922c245cbc9f476a3fa1c6a3070a2e9515b9bf8937f271fb43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The primary attack pattern involves tricking users into clicking links within the document.

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 http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/rr5kslj8i4915tt0dsq27bnf15/ronofikewezugekekinur.pdf In PDF document text
    • https://projetounificado.com/uploads/files/lulorumejorepekinefo.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/2ac4faeaa8f0fe153646e1d1a4d8c860/70078009569.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c36df5c5ac2---goduzazodapalifew.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/kawomodatozaz.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/pajiwaros.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/niwotevedilagamadofizu.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/ast4ncrb5l97d4lhihlsi1j4l6/76380312996.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e6b806d3202---29171941256.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/rugudofel.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/lolekowis.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078cde68b9f6---sifamiwoxurosedikegi.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba311bc838b---botanimevevak.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/as0akf8a91rlmpph80fttgq702/20094009314.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/89675933295.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/c8cac34524e27d66e2cc2cb9204502ff/27171406818.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/221729ea018dd2daa32a97cd6b459c20/malom.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c55acdeb1---13345943280.pdfIn PDF document text
    • http://gsoutreach.net/clients/e/ea/ea4f28bd0b090870cbed8536b6d1d406/File/wexuru.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/77b6280ccc1f325dffcd62e375e0a7a0/19236790858.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/07/files/210710202239.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/66830140640.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/wuwemajavetogavudagagasa.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca242d12f0---91207619797.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=ipex+connector+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_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 18408 bytes
SHA-256: 1380c61fe38e7d3b248a30ff85445745d50a7f2a0f3c6bab3d8754966461cbc0
font_01_sfnt_off000121bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BD 10196 bytes
SHA-256: 10e62e8a7b959db30df23b71ba69b98ac29b8668d7d65c7d458d9813df07b68a
font_02_sfnt_off000138b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1