Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5e864a864fcd4d…

MALICIOUS

PDF

92.6 KB Created: 2021-07-21 17:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76a56d7d1ea03cc9a99f88d0800f6f0d SHA-1: b1dc978cb649108de641fefb25e89a0334d801df SHA-256: 2d5e864a864fcd4df0a94d23c7c21322d9648436a53c3bccab9477b72bd95f47
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with exploitation techniques that could lead to client-side execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://teplolux72.ru/upload/file/vubugurisapekavuvi.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/0908aaaf24053574434d3a60c9423828/24916215724.pdf
    • http://edilgroupdigiovanni.it/userfiles/files/40848821488.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0161e5b75---megozu.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebc6fd94ca---wobazigidileni.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b522966c74---vesavebodiwubovujajuke.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3433834be---39547202371.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b054d2ca10f---68495824780.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/05067342540311124325e4a12cdd01c4/notaxada.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d9226aa34f2---99838387457.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf2c5c023f---pipigexepodofofonesunixe.pdf
    • http://gabinetortodontyczny.eu/userfiles/file/fogumuwuni.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607353946de86---sibejabugexopozidilolimo.pdf
    • http://duhochmis.com/files/uploaded/files/47704812551.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/f8dc19fc5792554c9bb4764cbfb6e6fd/sajijujazelesuzajaral.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc69db77f8---tejomegejuzawak.pdf
    • http://vnndt.com/Images_upload/files/74764838298.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d41fed49935---80088653437.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec5dbd686f---76094931499.pdf
    • http://www.vegagastro.pl/upload/file/64018374175.pdf
    • https://lawina-radom.pl/files/file/81278283978.pdf
    • https://doganagolosa.it/file/45456693459.pdf
    • http://nordicaluminium.ru/userfiles/file/13964354929.pdf
    • http://home-delighted.com/user_img/files/kirirorevejozudimorobela.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=dicyclomine+and+gastroparesis
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010624.bin
4405a5ac65a8eee7e8a4908385a463aa8e44f076c601cac0cb8ef593f4c20f6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10624 17588 bytes
font_01_sfnt_off0001330c.bin
30a536aac8acd2ae3e4492af4a8f0df2642a31e617cb0770c225788eb6dab675
pdf-font-stream PDF embedded font (sfnt) at offset 0x1330C 10972 bytes
font_02_sfnt_off00014c4a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C4A 16792 bytes