Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc27cae62aae44cc…

MALICIOUS

PDF

88.5 KB Created: 2021-07-17 09:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b65bec0dfee800c108b14b7b731ff2fc SHA-1: f1490347b435af2be66b4591b379903c25b3ebed SHA-256: cc27cae62aae44cc2fdce58697526d7e45af40cc3391f59e1e77478f9cd139da
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e511887596---renukab.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908156d6d7a---57198126339.pdf
    • http://aeronautike.com/userfiles/file/kidibesokatiralobuwonam.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/6bb84a1abfb6fe581cf7ee1a617802fb/77863187848.pdf
    • https://dacinsara.ro/fckfiles/file/zajujufibenasufowafok.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/b7712e014d26aa3eb41c6c6beb0e8bb3/zamagokepoxepelogevud.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9d2e3ce13---fabawasariwave.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071e9ca0fa44---fovemanewozuno.pdf
    • http://canavesiobruno-architetti.it/userfiles/files/mijix.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4db242c71b---barigorugetovozoxez.pdf
    • http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/kewuwebup.pdf
    • https://a2designbg.com/userfiles/file/vepavetepagosivo.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/8e343bfeed1214af9ae9f7271e04e6c7/xebajatomijirudimipabipo.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16072e0f279067---19868956720.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/73vls53sfg08an2fjvli0kkei1/koneruzodobesoda.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f0306cec0---lobexumuv.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/j7pc4akek7u89v92rkaqm4m596/jexamumerexef.pdf
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/17300918330.pdf
    • http://thegioidahoacuong.com/uploads/image/files/90841025869.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d13e38918---57180752211.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16094a5660986a---64814972007.pdf
    • https://escaletravel.com/userfiles/files/46583068957.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=best+software+to+spy+on+iphone
    • http://s292376414.onlinehome.fr/datas/imgmail/file/98499090066.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_off0000f4da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DA 16792 bytes
font_01_sfnt_off00010cec.bin
e43b2b736652db1809a8e0b7fa3d8a46708814f7714f0fdeb76150ef3def3726
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEC 17428 bytes
font_02_sfnt_off00013aa4.bin
2b924578c4f7115b6f5f5800cf78a5a9d0ea9be92ee35618e3769c4e7cd35942
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA4 10664 bytes