Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed02b0f21d83d30e…

MALICIOUS

PDF

92.1 KB Created: 2021-06-27 23:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1f025c2dc662c795197475f4a3b16836 SHA-1: a4c6caea33c6f93943c58823941eba070d7faf68 SHA-256: ed02b0f21d83d30ede2a14ad148103e39c95980726bf17836f6a5578b5a9375c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and multiple external URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these compromised sites, which in turn may serve further malicious content or prompt for user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://catamma.ru/uplcv?utm_term=the+definition+of+abolition
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608104aadf555---88437927246.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ut120gfri1orjbucsnik4j8id4/99109659513.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160849effe1638---67874583856.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086b698a5d55---27759628954.pdf
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/tafojiwizogebukuwatoga.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/21bba62995c434ead92377fe84c64c03/86279977965.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/50ghk9ok4msgckrlsothjmckb8/legajufijeligowaribuvan.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a75387f1151---kafovalugavitevuv.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/aechs2t7hp89mr4p8jv3fcg8d1/fodatuvudud.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090f677bea6c---69681283705.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5da3d24795---12878472768.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709c190a3d5---koruganetuz.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b273029108---35131921161.pdf
    • https://italvaping.com/file/nubelovuxe.pdf
    • http://adamlegal.com/userfiles/file/jasoreja.pdf
    • https://eobliecky.sk/userfiles/file/23229316131.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a4877c8e9---liwesanodaxipabakutoligi.pdf
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/32295367519.pdf
    • https://aneri12.eu/res/file/getarixonam.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/44f5aefe4b1f3b45617265b92e6db052/xalakizuga.pdf
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/5339583916.pdf
    • http://wannawwannie.pl/userfiles/file/buxamikijabu.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/f95fba8c0fd206c5aba4404b93a1491b/newomavanewizuju.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb28ce414a---luxuju.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608d45983f162---84762206788.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1f.bin
9f2536395a29d7c812bbe4fc589793459986a8522515af7b9120f97ecdd2438c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 10288 bytes
font_01_sfnt_off00010426.bin
8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10426 16060 bytes
font_02_sfnt_off00011935.bin
46c86171dfc1e0ab9d4da9cd1d050d2dddf0382939c2ffba9e41d3dd05e416ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11935 18124 bytes
font_03_sfnt_off000148ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148BA 16792 bytes

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