Malicious PDF — malware analysis report

Static analysis result for SHA-256 273ee3746804ec5d…

MALICIOUS

PDF

87.9 KB Created: 2021-06-30 17:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9699b9439191042aefa22ebfd57a94ad SHA-1: ac6767be0f4037f551ee328e6c17c1708e22d5ef SHA-256: 273ee3746804ec5d07af2ee6fc4a5899fc6731958d66fce3da5f0cb1038dd640
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a tactic to lure users to external sites.

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 http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160982d262ff85---tizusokajanakovulezumuvoj.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607436b6d96ed---naxaloraju.pdf
    • http://mmprogetti.it/userfiles/files/jukawoduliwuxotozava.pdf
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/8440646a0886c154adbbbc48dc823a6b/72344283587.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/josewikisowiwopupajenuv.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/b3a5be6bca0971a27d9cf0bf015982ef/65976195007.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/9get8csmajjohtc8nju1ba6l4l/budefe.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607133add470d---rowabavabunepogirekosu.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2266a9f8f2---wibukolesazoporenuzu.pdf
    • http://adveotec.com/img/file/21960924569.pdf
    • http://www.la-rocca.pl/app/webroot/files/files/77856273345.pdf
    • http://namngonviet.com/user-/files/jotuwub.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5d0d0e4f---bukabovaw.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/aafdecd660b19785e1bd655af9c42ee1/30901956383.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076398496fff---sefuvapuxoniguleku.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d476510229---2419725684.pdf
    • http://bio86.fr/fichiers/62800523562.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/dphmsnr1vf1aikvvs1ogm8q6n1/bedugufororu.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160820e06aafb8---wujawabuzu.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099fd478aa40---nitesobogosagetefilawusi.pdf
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/9716783955.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b60d03512---61919397649.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9d2357ecc---27371242464.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2c850ea58---manazolurebalonixot.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=use+or+in+a+sentence+as+a+conjunction
    • 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_off0000f4ed.bin
d4600e2ed14767804c40e73a29781b4f072a62bbf18871f641b8b2412e08a150		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4ED 10416 bytes
font_01_sfnt_off00010ca4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA4 16792 bytes
font_02_sfnt_off000124b6.bin
a386447e597e1c7b6d459e591879735b0dba1f39ed7d7bd1c15815f216c8c614		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124B6 17128 bytes

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