Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34c3305855d2194…

MALICIOUS

PDF

89.0 KB Created: 2021-06-28 14:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 700bf82181cb14af3df1a31a112281cc SHA-1: beb7c355d3f9c0cdc4fb761e32f0709d758f9b94 SHA-256: d34c3305855d21947a2af5ca1fbd09e6861c3753208e630a2ed6e3748081c94f
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple external URIs and link farm heuristics points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/e6388bbb39e914eb9fc28f02da84ecdb/51989577915.pdf In PDF document text
    • http://arcstema.com/userfiles/files/10700394840.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b6e3f80636ff77c0a566424590138e32/woredopujikatusekifepuvum.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/4d4537f6962c9e2ed4bc281e315d1608/8872922895.pdfIn PDF document text
    • http://fitviewer.biz/files/file/lumadotegusitir.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097878ea7a7c---kikitipupelo.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/l1ha28l86br5hdbcb79ouff0j5/17897796799.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/48322504233.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/37589369981.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/jumurefenaxanisinefuv.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/59459484961.pdfIn PDF document text
    • http://intergeored.com/upload/File/luboduzufuwudag.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/8763f06b64053954ff86405caf9d2c2e/52135810634.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609972a69edd0---subadaze.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/6761191ad9ede272bb013053c9a06596/41438484422.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e276931ba0---zajokafupegepadogafikosiw.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/49915672872.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/lugunapesigorefujib.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/fd0e817966556b5053737eed6657e6b4/64052276681.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/72751504433.pdfIn PDF document text
    • http://womenscouncildallasarboretum.org/clients/85748/File/vikemejiva.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/44041006388.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=allergic+reaction+wasp+sting+swelling+after+48+hoursPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 11212 bytes
SHA-256: 35a7b302016a4fee1e6c4ee2e5cf4a0953841063d9003135bda8e14e5c419b3b
font_01_sfnt_off000110f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12903 16700 bytes
SHA-256: 068010ef1b8166669c07148ed792e151cdfeb9269158629d5ba33d020c948141

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