Malicious PDF — malware analysis report

Static analysis result for SHA-256 0297a2cf2cd0e4e7…

MALICIOUS

PDF

92.2 KB Created: 2021-08-01 23:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd77ebedeb25bd218d53ef57c2f8e8e9 SHA-1: 7a6e3edf64c05e37e1cd51414a429ea296a17b81 SHA-256: 0297a2cf2cd0e4e700dd9b5f17cf1858dab3dea509bde320a25465ec506c3249
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=monster+hunter+world+rathian+longsword+tree
    • http://kag.fr/userfiles/file/87207482888.pdf
    • https://holocaustresearch.pl/nowy/photo/file/53686428704.pdf
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/93175289524.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/ga70drl7mjbf0icq57p94e2rdk/mezitezoxupusalatu.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b882d497023---toxoso.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/fan290gaiu06rlk9gk3i698vps/wutut.pdf
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/1203113233.pdf
    • http://xaydungdonggia.com/app/webroot/files/images/pages/files/90365700933.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160eca0432cf6f---59426212097.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/kongo6p2lu6uu60me1skv2gfm9/mafabokigafonetabemusosan.pdf
    • http://aihyang.com/userfiles/file/farumiwizino.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/6a7a4e7dde328517f3edd7fbaf170410/sogesufojiwenuzedaxegudar.pdf
    • http://anoh.net/pds/userfiles/files/gojaxatarusosabunalogivod.pdf
    • http://hatowo.com/app/webroot/uploads/files/87878951322.pdf
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/9473232728.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/dae204da1c0c2b2453ff1a2bdb0b1768/29356249079.pdf
    • http://ibb-online.ru/f/file/butarejile.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fa33e3d6a---44991544313.pdf
    • https://n-zvuk.ru/upload/file/rarezi.pdf
    • http://www.mezmat.ru/ckfinder/userfiles/files/pevurexelo.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160fce66ae6ce8---puwukuluzexanipolalonime.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/183a261cb554df4b0eb8e4739fc8d888/bevaravevarufofaf.pdf
    • http://hanasushichoice.com/uploads/files/fagosejotaxidoxaxurej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001046b.bin
53130a7843665aeb18b0959eabe9486bafc837d3554ccd0fcee4b1411f6f2ab7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1046B 10704 bytes
font_01_sfnt_off00011cc1.bin
e47343349737141505b64005fae4a0e3218ab10c091abdb23be75f383fdfab2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC1 17624 bytes
font_02_sfnt_off00014ae5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE5 16792 bytes