Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fb79a7eac2207e…

MALICIOUS

PDF

91.7 KB Created: 2021-07-14 05:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7d2b2b1daa79ccac0dcf9d592c47c0f SHA-1: 39e0d9c0fe21fc5ef7aceffc92268f7bf5e90c74 SHA-256: 49fb79a7eac2207eab91f42f4c0a6b6d26237ef605c966146be18bda6701aeff
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various websites, including those hosted on compromised WordPress sites and disposable domains. This pattern is indicative of phishing or malware distribution campaigns. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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 https://lamaisonducoeur.ca/upload/editor/file/62314481924.pdf
    • http://np-laser.com/upload_fck/file/2021-6-20/20210620044411598642.pdf
    • http://jinistudy.com/_UploadFile/Images/file/1032988106.pdf
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/57121090187.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/v0v3ijj5c0ae8lrkpipkiao1po/juranirejusul.pdf
    • http://kstarsmall.net/userfiles/file///fuzanuxelijiwokoxotabonew.pdf
    • http://homespakistan.net/magzine/uploadfiles/file/2007346031.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/21c4f66a0ae4f7349c533d13e6fe4182/29796563188.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/18268689007.pdf
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/17197908786.pdf
    • http://phillipsbrothersmill.com/clients/6/65/65192871cce8a6e36080a9ebd2808b02/File/movogenatopedikete.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/e788bf7b5a94b046037347ed94146d1d/63245506392.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087653184bfe---19803244957.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/3a8f5d613af5a39b9a254e3e98d867a8/87296582827.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d381f95997---42044177823.pdf
    • https://tecnicamistasnc.it/file/47526859943.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/7ef2ab3454b9aedc2db5d4762728fb53/tivikifivirekojejugirutik.pdf
    • https://ckmusicdesign.nl/userfiles/file/goladoxapukalamafu.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a140b637ed6---vajorejudizunigedoranur.pdf
    • http://klimagra.pl/images/wysiwyg_img/file/64778174883.pdf
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/gutaburep.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607024d7cbe9d---49605289005.pdf
    • http://harchovyk.com/userfiles/file/40608286744.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebfc9c9cbb---25212068594.pdf
    • https://defaico.com/d/files/vubigupa.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/8962bb5b2cd2591e017028e6970a4bfd/bidabesajodis.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=memorare+chaplet+how+to+pray
    • 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_off0000ed08.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 16792 bytes
font_01_sfnt_off00010519.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x10519 16312 bytes
font_02_sfnt_off00011b25.bin
3505ed736f09c4c27aded0929cff94bb1fdb06832fb37e0eb964088fc3da6e4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B25 10468 bytes
font_03_sfnt_off000132fe.bin
47200c3ad64e9939185c8c3d61423e61d756aebed7a7dbf8dd62593aabe64b25
pdf-font-stream PDF embedded font (sfnt) at offset 0x132FE 17040 bytes