Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ba7378cadadefc…

MALICIOUS

PDF

92.2 KB Created: 2021-06-28 05:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2fcdcb8196295cedb7faceda5862ce2 SHA-1: 75373af2850216407d190a21ac78eb747882497e SHA-256: 72ba7378cadadefc0b066f6c2991f73d04c28c3bbe0d76180904f387a594c390
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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://cructi.ru/uplcv?utm_term=what+does+my+homie+mean
    • https://nestaerospace.com/uploads/file/23512239552.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ab839d1a7d6---zaxewu.pdf
    • https://farmaciasacoor.com/site/upload/file/bowifipepetuwul.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609b622595aa7---14504636245.pdf
    • https://aduanaldelvalle.com/userfiles/file/notifunatuguwubisowosim.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ba49e57b7---80171632160.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16071965bddf04---jawowupedabaji.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/2742855c79d137866dd06df6d8a2f907/kudemopowezazoresajibe.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/tsikaplb3evjoudr2b3msl69p6/7684856307.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/339177587549cc3e4a6a94b984b2a692/80742650185.pdf
    • http://classicalgardenfountains.com/uplds/file/4255351753.pdf
    • http://standrewsparishhighschoolclassof1964.com/clients/70428/File/lebezaledupelewagaxeluka.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/qv4ne6qb27q3ujtj60a36cln13/83603623148.pdf
    • http://osc-pribor.ru/products_pictures/file/47944852986.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c770bdba582---sunojirixomovuko.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/7hl5td1qjdpv9449dlc2dl7721/fitesonimexirelawurolil.pdf
    • https://ladangmimpi.com/contents//files/58132318762.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/7of9tie238ql865hpu3a7u3f27/14970563423.pdf
    • http://amandatravel.com/userfiles/file/64519076768.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ba26aae08---64652263383.pdf
    • http://nct-vn.com/userfiles/file/gizijibaxevurapagiti.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c320803f45---fafolikobebiguvelazodavax.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/5be820c5a5c38658a6540c3d15b25f6c/tomeburupaxalalejamezopo.pdf
    • https://waelfawzy.com/userfiles/file/
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/d41a2c0a402f2d1da560568e9ee00fb2/98871162917.pdf
    • http://suamayin.biz/userfiles/file/42933708414.pdf
    • http://projectcom6wrk.net/ckfinder/images/files/87779369009.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f06d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF06D 16792 bytes
font_01_sfnt_off00010884.bin
50769666a0bc69c9af7a2d2faa3edf633e5b7863c7af124dbc4a0c38e7d2d8a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10884 10476 bytes
font_02_sfnt_off00012026.bin
5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12026 16344 bytes
font_03_sfnt_off0001361b.bin
6584e27aecafc741d7bd688fa9de6b1956b012e3b52d9d65fb2e3e334dd586f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1361B 17068 bytes

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