Malicious PDF — malware analysis report

Static analysis result for SHA-256 472b4302149810e4…

MALICIOUS

PDF

87.3 KB Created: 2021-07-19 00:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69e84b94cdb5d7f7513a35100fcd9550 SHA-1: e3a276167c23261303f1f9c66e1bb3b2086f5eb8 SHA-256: 472b4302149810e42b5c5176ae6d6bdf92cfd144e636778a065a41c635e746ab
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple compromised websites, likely intended to redirect users to phishing or malware download pages. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://akcjonariusz.com/UserFiles/file/38995471101.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e037176f4b4e7195cf94f29af6842d7/51177773407.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/1cc3e955b34fc5af7c3acf604131dae3/burolofamesapomera.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/3cbe07d60dc8c2447bd548955de1640f/ferab.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/9712e0f97160892bda94fa3784dba649/dadekapit.pdf
    • http://www.jacenter.org/js/ckfinder/userfiles/files/99810843439.pdf
    • http://t-p-fortune.com/userfiles/file/7958176072.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bec3420da7c---43991690243.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/v21th28q0vjp1tll8i2d0rgd01/50158195601.pdf
    • https://vleek.com/uploads/files/10099953495.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16085297760b4a---vaxov.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/6945ef9b33fb10a367d63b0ccc2cb377/joxez.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/914d366784521ece2aed4648d82eb1bd/16073589534.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b73dd60324c---wozutipaterikamisoraxu.pdf
    • https://susta.vn/userfiles/file/wererematufofituxoputa.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ks2ae4gpitk6nltcebnjvjh8lf/mapivitakonanu.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/96549e48d7304c8dfde5a6da503b1967/fakipegobanoroxoj.pdf
    • https://standardpromotion.com/images/upload/userfiles/files/28029144398.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/5dfc45444f40aec714e2273b9f629b80/14779170402.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/q9d1e3lsk3edd3egl6f4il2b5v/pamodufifotemutobax.pdf
    • http://sushikyototogo.com/uploads/files/botepixesufogoduzete.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/d6b44e87f145785747bc67e5d211dfc7/dufokuxotajojug.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/b57a43824495814f5bc0d12074301bb3/pinafufemafaveduk.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/63rp7s1b5ra7dc604jev4k5au3/74768508997.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=hunger+games+stream+free+online
    • 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_off0000f279.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF279 16792 bytes
font_01_sfnt_off00010a90.bin
6b578d572d31af1c55025c1306ab9bfb2ef22bbad8d91c5ae03845744f7f0710
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A90 10648 bytes
font_02_sfnt_off000122de.bin
865a54f9a11602262c2c72780c783e896be6e98f12f23b267de5077c0dcb6226
pdf-font-stream PDF embedded font (sfnt) at offset 0x122DE 17244 bytes