Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc86cfaa5f486d4…

MALICIOUS

PDF

86.7 KB Created: 2021-09-02 04:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fd3182fc506fedab8a02a991e1b80863 SHA-1: f3d3da3ed16883502a0065469a8bd8bef4de4f4f SHA-256: 2bc86cfaa5f486d4663be7397b339de624240d16ebc5edd4b128798bb2acf184
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://ketchas.ru/uplcv?utm_term=your+love+is+beautiful+hillsong+chords PDF link annotation
    • https://agentcctv.com/userfiles/file/21114275746.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///86118918835.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/41306351593.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/61049273100.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/6b5cfc9bdde047ac06853b65f95f3bd5/ruteladogarumepakowi.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/sazinegekup.pdfIn PDF document text
    • http://bernendorf.ru/userfiles/file/noselodugutikil.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/420774e6f6ab6f81b13c361f00a4bf26/74534994408.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/zozodag.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/32788245672.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/gelokafarebukifave.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108c41c16b0c---vofojefiwoto.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/85f598bee163e5ea24c12338c6bf919c/rumumivise.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/vajilujezozutadaxepudamem.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/33801727770.pdfIn PDF document text
    • http://vinacafe-dalat.com/Images_upload/files/dudujavudabagubunizazopar.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41a5193c66---limugibax.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf17871588---98436221248.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/dujirusowa.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/51d5b50ba522f9bfc8cd3de376001b35/luvem.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/bofalizimozusedofama.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a2384c6af---jegipemuzuravikubu.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/nunelevinofi.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096fee2ebf21---nafexet.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 16336 bytes
SHA-256: 3c30c3b6fe3d4b8f0bf97b3b919f31be8be4c83276e0073d11e5400b5ab4286c
font_02_sfnt_off0000ff78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF78 20488 bytes
SHA-256: 1db8a5946d9a9787236fb873996b4b84543ba608ce35cbccb286a58e5eb8672e
font_03_sfnt_off00013366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13366 11044 bytes
SHA-256: 15ddb98d202c074288f4edd7438f09ada7a01ccfd2c5125b5f9e60cdad20aae4