Malicious PDF — malware analysis report

Static analysis result for SHA-256 24da605b8faefc46…

MALICIOUS

PDF

129.6 KB Created: 2021-08-17 03:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 274f8215c934b0ca53db763cc7a71971 SHA-1: 9bc7ac7ae5a02e08b79816c9a7b36d1031e3899e SHA-256: 24da605b8faefc46f07a978935e718a17410570bcb98c8b2128b3e9bde0355ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://coretry.ru/uplcv?utm_term=download+ultraman+fighting+evolution+3+ps2+rom PDF link annotation
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/rko3t4js183rs4td84affur5gu/tobemok.pdfIn PDF document text
    • https://xistenze.com/files/files/18053950112.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/1c93b6e78da45179141a509259ddac32/gagexan.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/622a19a806d84babdec628b9b0e41979/fisijajinevisurenubogem.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859cae76678---79551019633.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/o9nnvs4sibj0a83rfp6c5hc6ti/pivimu.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7a435c06b---xisumop.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f517561555---razumetemiribaluzi.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210729_145759.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/xepoko.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/71419372094.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/zisaretonoduri.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/lemogiwikejefatawejuk.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/46812736759.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/faguzukerefetixufibije.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093fe708d460---laradugokimasowilu.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/21850111979.pdfIn PDF document text
    • http://rotang.net/userfiles/file/49040945729.pdfIn PDF document text
    • https://podimercrm.com/img/files/32873543033.pdfIn PDF document text
    • https://magatek.com/documents/file/58677391714.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16085ad757cd59---88944065631.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/21852487861.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/a44444bc76d76529cd83ada4d3e3e47c/vetegejadubu.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/a30isi03fh6m2utdrer4u42nme/97155504839.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/c90063d3bd94fb5173d3d6234c972e6a/26979798195.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17093 11488 bytes
SHA-256: 19f7dc029eaa3c6f5b286e22e306c2795d68a6415498873063a0925b9ab99940
font_01_sfnt_off00018b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B7A 2156 bytes
SHA-256: 05b82d81f274b0177775eccd476d64f06917adc2560a172773733aa82495c692
font_02_sfnt_off00019540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19540 18672 bytes
SHA-256: d8adbe119a532ec6f53fd7e442aa79fa117aa37a7d3269cc2530d0892dbd3f22
font_03_sfnt_off0001c6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6EB 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_04_sfnt_off0001dc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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