Malicious PDF — malware analysis report

Static analysis result for SHA-256 47650be744a65199…

MALICIOUS

PDF

86.3 KB Created: 2021-06-28 11:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4294ed76a79a815ba7efa8f5985380d1 SHA-1: 286cb77e98b97de045f64fbca2f57c0f0bb5ee06 SHA-256: 47650be744a651992b3fbcb4893345bb701e76ffd32b0896d013d12acb6f1a4f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised or disposable hosting domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://101doctor.com/uploads/ckfiles/files/60b278d838f79.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65d654dae9---lupalopetixovim.pdf
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/fuzukefuvo.pdf
    • http://gfb.it/upload/fck/file/25593942577.pdf
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/21813144127.pdf
    • http://accessiblevehicleservices.com/userfiles/file/17980184911.pdf
    • http://botosani.ro/img/uploads/file/jarovuxiruzabo.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/v52kq5svcf0ehidtmpp28u0107/75601083631.pdf
    • http://ats-dz.com/userfiles/file/22189680902.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/945985e13b4c62599c97098fb20a182f/89521055541.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/fe47aa39e82cef6a833793464274d2d6/96242361371.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098000083f06---24505082799.pdf
    • https://simplehome.ro/ckfinder/userfiles/files/benazewuxi.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083b3155780c---51282483486.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/q0j63tslsrh349ju85fav9k17d/sexuzabodarisi.pdf
    • http://augustaelectricalwork.com/editorData/file/sinoxirinamagi.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/0ec090a1be9c87ae4a30d0ef9de45ff3/36455398488.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fce46b8cb---bebimafat.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f252ed1dc8---votojituvewixiji.pdf
    • http://tipiland.net/upload/file/23011575436.pdf
    • https://vildmarksjagt.dk/userfiles/file/23941518309.pdf
    • http://m-s-g.ru/userfiles/files/tolilepolutibijufevad.pdf
    • http://yuhenganquan.com/userfiles/file/20210610205932_1608887496.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/87c3a4776bccc2de104c385b75fbea48/66866204232.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=pdf+to+mobi+converter+android+app
    • 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_off0000eea3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 16792 bytes
font_01_sfnt_off000106ba.bin
5f985ced15963a5e4734158b74ed44973bed5ba538499fca0fb865d5f3c3375d
pdf-font-stream PDF embedded font (sfnt) at offset 0x106BA 10772 bytes
font_02_sfnt_off00011f4e.bin
6b31cf68328bff70451fa548330ec9a85fa9652fbbd83482abb428fa7adeeec9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4E 17088 bytes