Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6c107b27f6e683…

MALICIOUS

PDF

85.3 KB Created: 2021-07-04 02:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0a9a3a38a06205e7bc998fe2f7727f38 SHA-1: 22a59be473059eb217fd738ec64db59f0fed2788 SHA-256: 2d6c107b27f6e683630ae7c9cb8924740aeae801b72f184e9b1405a131bd1963
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous URLs hosted on compromised or disposable domains, indicative of phishing or malware distribution. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings strongly suggests an attempt to obscure the true malicious destination.

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 http://laser-piskovani.cz/democms/userfiles/file/fufodosodunenobafukufibe.pdf In PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/jlp1rib1paqosm5dlfaifjbvq1/wadinigixofefemig.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/89d2b1341690a6c2dccbe2ca71b1c766/zoxewej.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/fae64e76b0ddfe15ddbc36b9433dbe2c/nikesusunedikukuvukajax.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160786dc3f23b4---nudizaxerunewediduvel.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/sinabemovevodotezafer.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b44b71760---kekoloxipodosozi.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/dizijazafigogidozoje.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/muxunezonam.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/xupumuroxok.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc63422c72---86820802706.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/27h267k0a6i654sld8c8bb8jup/nabukanomiturosesovok.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/kapibipa.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/pamotimogerodedamum.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/67fbc0ebe92569563b0cf633f52ccad9/lopito.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/geh4po1a9pdpcslr9q9feeo6r5/44256179527.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/vakivedilowo.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/e7e93fc38c82ec009b559605c01fd61b/xopawanudawewij.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/17571533757.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/3327db51e234283a70441794c2139bfa/21424839379.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/1d6b670ef6ccf0ade5808baa2921a5b1/90931946752.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/sjfgshtaojqvh287v0q5sqdcd6/juwexexikufelutimid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=litany+of+divine+providencePDF 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_off0000ebf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10409 10536 bytes
SHA-256: fc6b42344b46d4d88167ab7ea3913c9067f33ef8dc76c3e1d022a935aaf572d9
font_02_sfnt_off00011c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C31 16872 bytes
SHA-256: 15f8f5b8c2ac53c5a763af1ca862635c2d3125000221deea9765a152a26406f8

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