Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96d27f69790f099…

MALICIOUS

PDF

83.7 KB Created: 2021-09-05 20:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7b7e0823408a537a32dd1328d0644cae SHA-1: a672ea9a3fd7f95c17beedae98057e80bc4057ad SHA-256: d96d27f69790f09905dcbfd7b57ea9797c3eef95059f731da614400b105a30b1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan distribution vehicle. It contains numerous external URIs and links to compromised CMS upload storage, suggesting it is designed to lead users to malicious content or downloads. The presence of multiple distinct hosts and a 'utm_term' parameter in one of the URLs indicates a coordinated effort to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://huntic.ru/uplcv?utm_term=agroforestry+book+pdf+free+download PDF link annotation
    • http://loscogliodifavignana.it/userfiles/files/67659002611.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/bfd245ca72b0bb9a2acf743d1351a423/sopepafafedugoxifidimarol.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/fc2bfeb7c459a86037f2ee80222cbac5/bapadobab.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1611bf229873fd---mufaser.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/fimiligetej.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/wezenobajixak.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160c57c089db19---78603815878.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b745a0827---xatudovogoteb.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/15676618753.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210612031958.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/42187463655.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613058be1815b---baruluzijaramimatewoz.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/rudedudilivobor.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106e62c06c24---musaxowuvavejukegubofiz.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/fibeboloxawovokodimi.pdfIn PDF document text
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/banimimej.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/j74sqeai0u5uuqfnjo0js2ap4v/3936033934.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/13105694461.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/sorirufox.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/p2ldcgc0q6eq9tcjt6der87fcj/zavavaxokap.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611098e278e68---44334363050.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160af9266a40cf---pedofusuko.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/277e2aaa7347d9de5d8d664df23877b0/32531339798.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/52182295946.pdfIn PDF document text
    • 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_off0000e019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE019 18136 bytes
SHA-256: 2c86bbe4d0b5fca72013be4fabcdda867c4c9622cec82c3078af6ac9326860bb
font_01_sfnt_off00010f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F74 10992 bytes
SHA-256: be6a86884464b626c075a2d75672d9a1e4d4c3d85425d30eadbb47afa01d7569
font_02_sfnt_off000128d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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