Malicious PDF — malware analysis report

Static analysis result for SHA-256 6328c7013ac42d0e…

MALICIOUS

PDF

95.6 KB Created: 2021-07-23 08:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1cc62fba653bfe2686ac65e0aaf53114 SHA-1: 191cfbeb1f8e40d68885442fd439b92dd4bc88b7 SHA-256: 6328c7013ac42d0e6a7ec93a46322e92f525c0fd107036e367275b99d88c77c0
96 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting it's a link farm. The ML classifier strongly indicates maliciousness. The document body is unreadable binary data, but the presence of numerous external URIs and the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristic point to a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • 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://www.moyekolodin.com/files/lodalitupajafipopi.pdf In PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/d4abdf2021a63923c1b971bad0fee915/didowifulaneg.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1378499a69---numosujexopibopefesi.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/5406a45039429549ef0915aecb71b7eb/90205290409.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/42084176535.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f38d56b96b---piwipubugime.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/saveluvulolefi.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608372322847e---67235346975.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/2193991f7dfcdd57ab7430e1f7735b10/dovukuwoxediw.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/be0ef97cd66a1ff960026d797f77726a/6778979500.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/25702709817.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/fbqn9drufuge0ugg891ptmakk7/fipomoborivajomezeko.pdfIn PDF document text
    • http://weingut-suppan.at/files/rupotugufusenipukewisor.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021060501592573499.pdfIn PDF document text
    • http://americusfelderfamily.com/clients/0/0c/0c5e5e27a4da9db51eb23c24aa0fa274/File/kegibogivipixubefata.pdfIn PDF document text
    • http://thesetnews.com/images/fckeditor/file/fufisomug.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160825b891f103---40836023114.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/82aa30a16a1f05313861585e824a0a22/67635091314.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c03601a2c48---botolitikelep.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/t67f8epcp57un1jurse25f2gp6/woriputitejaz.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90e41adb8f---94431426422.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/b81176bd31b7e1de62caf4f1906d1789/33402538729.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c39280cc1c8---pobosuxow.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/jpj9pf9ubufnctrvam941j4k4gsh4489/13858628271.pdfIn PDF document text
    • http://nensi.si/upload/file/95704075296.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=chat+anonymously+with+friendsPDF 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_off00010e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B0 18784 bytes
SHA-256: 817296bb03712251e0151f1567f93b14292e5ba1cbb9bbc54b5a2135697cba91
font_02_sfnt_off00015691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15691 10948 bytes
SHA-256: 2d29ad820c45f8f040448a94bcd677c93f27baaebba2fe9fbd0b943677137285

Open this report in the interactive analyzer, or submit your own file for analysis.