Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9514932070bc84f…

MALICIOUS

PDF

92.7 KB Created: 2021-06-27 16:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d5d79550832dd74709a2dbd52eb564cf SHA-1: 6ea232f1c1f693744f8412a1fe606b2a14768d83 SHA-256: e9514932070bc84fb602a3e2667468c732f973c365ba6a5ce0fc7e9d52a25fd5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious external websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/3f3d864974f1c351bfe1e19927f74dc5/72796037453.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160afe65cd438f---levesibamipumumabubir.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/e393022ccfc6sfbi0rc4dngcgi/6514451195.pdf
    • http://vswet.ru/f/40049878566.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf23bea07a---47030065002.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fda1f8ea6d---25532048165.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/80aaa7a7032081414f28018bc28e190d/zidedigawegud.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c571d1c6786---1526965530.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/bj2u4ii9f3s2g5htk57gfkvpg6/dinixosaxulepuzu.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/a7fe2b6718c52790a324a7e76d15ce69/57437436690.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33199b86f6.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b269007f2b3---88715720297.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2de70afff8b7545391096c438a68174e/23768008345.pdf
    • http://nutronicltd.com/userfiles/file/jisujamunuzuwajamolakasa.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/1840fa3726ef53c7a2d6db886bbbf63e/42720188343.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d20152bd4f---wogunatewimutuxolexivor.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d4441592a547c414bd4e2ec492cb0fd7/bomelupuperumutufotex.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/bc1bf8fd8505ea42d961b2e39aec30eb/3567513872.pdf
    • https://cecprint.com/images/file/51405088517.pdf
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/6626167802.pdf
    • http://xiaohecollege.com/d/files/55074359492.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/4ccpv2fcnepgjsfl5a0d8661gf/rexududedijidadevun.pdf
    • http://maility.pl_adresuserfiles/file/47369568026.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/ec8eba058978a3f99c81e91ab7604db5/21646309581.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=all+object+oriented+programming+languages
    • 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_off0000eda1.bin
5a25a4e9aeabff310f9d162f35fe67108c291a2531282f71f4e1ece22dd00f58
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 17416 bytes
font_01_sfnt_off00011b09.bin
ce3886bc0c37a84bbd8d6a2349654c682dfeeeaed84ef2fbeb21ebb40e6f5e4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B09 11208 bytes
font_02_sfnt_off000134cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x134CD 16792 bytes
font_03_sfnt_off00014cde.bin
439f91fc52918ec11de7c10fc66f42d556e3ca0baf24f0cec7590a9fe4e8f18d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDE 16392 bytes