Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e6dd25b6480641…

MALICIOUS

PDF

88.4 KB Created: 2021-07-01 14:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d8ed29fda7a4a97ad4d8d5122512a2c SHA-1: c45a4f01b8bfa40bde00cc97d0dab1afb51da635 SHA-256: d6e6dd25b64806410a8c997d5da3fafe68a60067f92d2bf6cae64b7ab1c2a888
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised CMS uploads and disposable hosting domains, suggesting an attempt to lure users to malicious content. The presence of multiple external URIs and link farms indicates a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1608b622fd15c9---guveneno.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c88181668dd---86424524474.pdf
    • https://eminencesolutions.in/resources/userfiles/file/9543496479.pdf
    • https://go2germany.ru/files/file/xarafigipirix.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/eb3094749b130858587e5bbcbaacf1d4/37987150386.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e324401a89---padaxanawaravorixib.pdf
    • https://arhometutor.com/userfiles/file/riwaloxumarigi.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095b6989b800---89085503110.pdf
    • http://arcomproltd.com/userfiles/file/gebepedorataruko.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608841563a2d9---69173294872.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/faaaa29c12909f3a3b3e2d7530c85fad/77997005542.pdf
    • http://nemdanangpho.com/uploads/2021-05-28/images/files/58208645744.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/aa1896791d96d1cdb37c4db4caa3859a/fujonakuwojewegakuxof.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/13f6f6666de4dbc37a9a15d718b7b49b/72972343809.pdf
    • https://meesens.be/KrMee/Tekstverwerker/nowodupavumanekekewabel.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/b5f2f31338784b2f60d0a4b6613a904d/42579354822.pdf
    • http://acpiindia.com/userfiles/file/22655729038.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/308b43a1a5ce58d44b572f457e4e291c/rajizeroba.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607584d780d1f---68213880357.pdf
    • https://watosaphotography.com/app/webroot/userfiles/files/20210626_011433.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b8545f624---29354305654.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/bdad174c6591b53b0b4b6f217a9c7026/58800725456.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd99e8d7d6---loxef.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d08705c106---fezabuwifuzobekap.pdf
    • http://bannails.com/fckeditor_userfiles/file/soxovew.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/ee543b04663007c6cd197b43a50adcd6/pagakolavadipowigeninom.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b99a5058b7f---17265689323.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=types+of+remuneration
    • 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_off0000f84c.bin
384e2685f299fda617dc701da47d6df2c13ee651fc6b3be8dbb361bfef61fa1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 16788 bytes
font_01_sfnt_off0001240d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1240D 16792 bytes
font_02_sfnt_off00013c24.bin
ad0b33b1c0e110c728683a5c97656f7a1bb43aac70fbf6732af23508c996b3fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C24 10652 bytes

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