Malicious PDF — malware analysis report

Static analysis result for SHA-256 02725e058c0fa54a…

MALICIOUS

PDF

81.9 KB Created: 2021-08-20 09:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1fe038cbf12b996fbb68e442bb5f70ae SHA-1: 296af4ed4b1b08fbe8e12e8e9ebe4304f125c56b SHA-256: 02725e058c0fa54ab7c406ef83e523fbb70780807d5a9920785977df5326bb2a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by an ML classifier. It functions as a link farm, directing users to numerous distinct hosts, many of which are hosted on compromised CMS uploads or disposable domains. The embedded URLs suggest a potential phishing or SEO manipulation scheme, aiming to drive traffic to potentially malicious or low-reputation sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://liccuza.ro/stiri_files/file/93059116768.pdf In PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b21dc177a12---37596859273.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/54266701710.pdfIn PDF document text
    • http://myphamnanyno.com/luutru/files/vavelanolagovenikolemuzor.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/dd6637f4e5bfd61d087ac32b4e371492/53957442152.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/76225545017.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/57653187908.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fae25c862b---sufovedepajefirakimanifo.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e5e9d894b---bavadofugetezomabu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071503c4c159---jexebabajokigil.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c3408537f---37892716316.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f393c579a85---tonujubawim.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7d5d10f7d---netugoxutaduxoti.pdfIn PDF document text
    • http://markone-tools.com/upload/files/94958574853.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/jazotugureso.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114e455362e7---42751729489.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161187970bbf6f---65242673780.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/30322361716.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/givumebapusivenaseseneli.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/tiwunipekiminik.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/78641840807.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082879ec71e6---8819206413.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160add1b71c770---pedutazeruxuragimobu.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ca28a3f47---babixuzux.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/52245066582.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+reset+iphone+6+plus+without+restrictions+passcodePDF 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_off0000dd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2F 10956 bytes
SHA-256: 50f536183a48266b4bf1e48f8ee5f77dae24eb19124a38227ee6f6ae37470913
font_01_sfnt_off0000f697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF697 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA9 16944 bytes
SHA-256: 9b458a664b5361b09abaa54f5f6c56c43ad176d2fe421769daa44b8bca038714

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