Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56dce584c1c94b5…

MALICIOUS

PDF

157.0 KB Created: 2021-06-25 20:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5713a1a0750472b63e4aa6236e85c041 SHA-1: 73264f21739b990999ea2296d4fe05742da81779 SHA-256: e56dce584c1c94b5020bcd9a91813a552166ff9a09add6e0893b53038394d43a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream and a link farm pointing to multiple compromised WordPress sites, suggesting it is designed to redirect users to malicious or phishing content. The presence of JavaScript indicates potential for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/ed4580a34f2ee8f2ea65b09c4483518e/dolovezuxoxolodegud.pdf
    • http://to-kajihan.net/js/upload/files/5917458242.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/0tcsocob0la5dl9h2rtr5k3phl/vumujofasazora.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/4515f4225dc49f0aab85b0d4d8f4efb5/48430011103.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/838f9724b55f76407fd709abaa1cb157/90804962028.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1311af0917d742535930a52b940dd5f8/31876791774.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/5ec017d63e25b0cb17b1e2160fed1292/46288205535.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/9b895336e7b96c034810d0d1c8943e8a/91194443666.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/8d80511a58c7cf25608f5504c83928c3/33586918925.pdf
    • http://studiosaletta.it/userfiles/files/28444427404.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16085091764a6d---fusorunijufupewewapun.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/c1127c705de6c89bd0fb8425fb333cfa/48954881903.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/db90979f5efb26107e5996543692ac20/92613928621.pdf
    • http://ytovietnam.net/ckfinder/userfiles/files/mitaxavubajupeler.pdf
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/77729778390.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608668417b817---sejavivapave.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/52a8a4b63bfd63171f4d78d164440175/48970090363.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac9cd38372---kurujowakobenevu.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0e9787f66---kaduvapupimuxur.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/diwadepitopapebod.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e6c54af48---17120552421.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/f7d63b44bb2cc81b7cd7193442370dd6/mabokamolif.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/nr499d01i9ja7qh4gvngqfmf75/90606966485.pdf
    • https://agrimal.pl/userfiles/file/93500977143.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/13cc9c14184d856c8f6d37a809490ccd/72846911017.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=for+high+bp
    • 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_off00020853.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x20853 16792 bytes
font_01_sfnt_off00022065.bin
e8c6bd4044cf8d81bd25025ed798d6a7510718350e1e1e69b2ba5d1db7c94839
pdf-font-stream PDF embedded font (sfnt) at offset 0x22065 18876 bytes
font_02_sfnt_off000250f0.bin
ce203f97a83552773571b84ff55767a1ae49c4a1ffc6bcdf330f1a2c7e287e07
pdf-font-stream PDF embedded font (sfnt) at offset 0x250F0 9940 bytes