Malicious PDF — malware analysis report

Static analysis result for SHA-256 abed02e93432a434…

MALICIOUS

PDF

84.1 KB Created: 2021-07-03 10:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b94ba48b216f0b53240d284ecb3d1c1 SHA-1: 03cd5d253d7cd9b1a0cb8f297f0f3c8a0fb93ac7 SHA-256: abed02e93432a43493a814505287a67f0128c3e679746aaf538c7b019b749b72
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, 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 heuristic firings and URL analysis point to a common pattern of using compromised infrastructure for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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 http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071a52467bc4---29718324680.pdf
    • https://deesudcoolingtower.com/userfiles/file/sokedijepebi.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070539c1417c---zopiguzopubuto.pdf
    • http://ildungrice.com/fileupload/fckeditor/file/59721809582.pdf
    • http://tsradviseurs.nl/mailing/images/photo/file/janurijaxuve.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81594d7c7f---95897912939.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a562978608---senudabujinogotezakujadu.pdf
    • http://iwilldoit.ru/uploads/files/files/zufulaga.pdf
    • https://etcbt.com/userfiles/file/17274175668.pdf
    • http://guojingmall.com/userfiles/file///52428400515.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/3635248bdc0f24366fce874c072b3bf4/ragijobewefigujilimivax.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa9f396718---pifufomomepiwad.pdf
    • http://innovatepc.com/userfiles/file/nugevadiwek.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/181757e0ff6203f7f22692176d4afb43/jododekopino.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b650f2f5bd---91011899099.pdf
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/miribakom.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073a98ade324---zazezodisi.pdf
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/91583598993.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c598642042---gunasasonilutuxu.pdf
    • http://ztkammer.at/uploads/file/telop.pdf
    • http://banphimchuot.com/userfiles/file/34765244465.pdf
    • http://palami.by/images/file/jusig.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c830905b77---mowavojuwomobufaxiw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=bilobed+meaning+in+english
    • 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_off0000c68d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC68D 16792 bytes
font_01_sfnt_off0000de9e.bin
146ff89f9644cd1939a8f0ad420826decb8b550b3f4e086ad7487f6999fd229e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9E 18144 bytes
font_02_sfnt_off0000fb43.bin
7863dc4719b4c0bf287f01f2303be677e819d29a892fcc7c08171d981912d67a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB43 18200 bytes
font_03_sfnt_off00012acb.bin
457a4bb359e1c0521743ed05847cd8f56c9a6c5eb03e1e4a50bf68c1d7338bc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACB 10688 bytes