Malicious PDF — malware analysis report

Static analysis result for SHA-256 365e26b2d6d0ae75…

MALICIOUS

PDF

86.2 KB Created: 2021-06-25 23:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 967d2b24ba1f25ac5bb6a5421e5cc8d5 SHA-1: d0b0b643e56bcc431ae68312b4df1c4e20dea19a SHA-256: 365e26b2d6d0ae75324b31546315e467603b7dff0f2f84143b8e84f2fac7a1df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious or untrustworthy content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure and link farm behavior are indicative of a phishing or redirection attack.

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://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9afd1a0002a2f596037677a5f64fbc16/5506803719.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/2980c6bedba34bf2fc43189b8a5dbb36/10336481939.pdf
    • https://divinenine.net/userfiles/file/7882074455.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095cd2b9d926---42525728279.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac440c4f342---miperopariloj.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/128e0e9dd568034fc06f59284a61d19e/wesilajika.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea1ff3be9d---guxifarerobawapajeda.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d00fe85d686---vexitaze.pdf
    • http://c2r-auto.com/uploadfiles/file/2021052123121573499.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d19e194046a---74673676071.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/3r43gqe91iort2bqrar6nak3c7/tejeterojomaxexed.pdf
    • https://universal4shipping.net/userfiles/file/10824366932.pdf
    • http://asustainable.com/global/file/35410148155.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078654850a79---71833359619.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0841169d91---84362663562.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa418d27eb---vafivesut.pdf
    • http://gymostrov.org/gymostrov/userfiles/file/mafirilupuzafetolavo.pdf
    • http://dogoxuavanay.vn/uploads/files/xomumamonit.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d289eebf18---76440376229.pdf
    • http://ngor2-3.com/file_media/file_image/file/95009629710.pdf
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/sesedesise.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f19bb36bef---39198435565.pdf
    • http://nitexprofi.cz/userfiles/file/91430042615.pdf
    • http://bezagsecurity.cz/userfiles/55318199287.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+copy+data+from+secured+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_off0000ea33.bin
648431d6273d8b77f16a2cea9cfb1cfdd44b6cbf794ee15207bd5b24d8038581
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 17716 bytes
font_01_sfnt_off000118c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118C0 16792 bytes
font_02_sfnt_off000130d7.bin
0dec1decf3b822ecf92bd868fdf31a0c3e4dce5af57f33e74343ea1ba2ad7faf
pdf-font-stream PDF embedded font (sfnt) at offset 0x130D7 10828 bytes