Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ec4bdda3c7b8f2…

MALICIOUS

PDF

79.2 KB Created: 2021-06-30 21:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 659fffd001e2bb05d3305b0e4c11a1fc SHA-1: ca1c2ad6b5562cde8252bf3f6bba6809c7ee25f8 SHA-256: f7ec4bdda3c7b8f2c3babe8bf998c88aac9a80c9046b688300a65a9514e9d565
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs and link farms suggests an attempt to redirect users to malicious sites, potentially disguised as legitimate services like passport renewal.

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://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/381a1a0424981f0b482d31b3c473cd3d/17719389250.pdf In PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16071edcde5187---gazuju.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/4h8qno55ebt78s7gdmuritgrn7/sorabefas.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/6114008871.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a73f7ca2eb9---putukejarigokekonaforeviz.pdfIn PDF document text
    • https://eucolait.eu/userfiles/files/sozenafuvilivume.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/81f165a1f9ca51f47aba0cf4a55c3978/setipuge.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089e67a0fe42---32137158141.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/87526540442.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/19542kir3g3qfn384ahpronmth/derepowi.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/68207009410.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/buwam.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/telodiwedud.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/847a3e655f39de6c009dfe873dfe5720/xofagovaluja.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/92446341680.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/55389407567.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/87905603676.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/56095affa46a07018dfcd81137bf308c/52789462639.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/0014741f6ddcb271a0e1cdd2202dd674/91006615365.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/15hlfkbq6ptr4keh02j7e4rmhp/14847333586.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f59f15367705c9b65a5220bd62fbf03e/temegopijofid.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/26b77793f37078fb6063f609d7f32866/vudar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=online+application+for+indian+passport+renewalPDF 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_off0000cebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 17636 bytes
SHA-256: 9e223f4a79e9a73d5574d7e419db3a8f2d2532f85a1b52a3ba3832e1f364be42
font_02_sfnt_off000114a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A2 10724 bytes
SHA-256: 4330d70e12f9329502ce39fed1f0783507175096eeceeea91dbbcdf3929e82e1

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