Malicious PDF — malware analysis report

Static analysis result for SHA-256 d726367926298e7a…

MALICIOUS

PDF

88.3 KB Created: 2021-07-05 03:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90bde3c0af628ef1d7081c7c6b394692 SHA-1: 6bb99c31d105303c05c3c431295b2b59c326545e SHA-256: d726367926298e7afd0c2a0b3c6ee7a8d376ca0adc90752597ee2e44b40a06e4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, identified by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristic. These links are likely used to host malicious content or redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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.
  • 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://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26dae16eda---lesevisi.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c49b5e4f4b---fifet.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6b835f662---36340062121.pdf
    • http://atenngo.com/admin/sites/site/documents/lofogem.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c55c1d62e---lofusuwuwozolexulo.pdf
    • http://volareinmongolfiera.it/userfiles/files/mosumebobunepomivagamamut.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b253754f5153f689df593f090bd8f56f/pixavula.pdf
    • https://dolmalatrek.com/userfiles/file/82466937566.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/c34b6a104c2f1a0cf3073d2e0a800659/sitowuwiduwulokutig.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/grdn638tgr6m1t5db34vh54g57/lunusas.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/6b549df2cb055344ae2e2514e6a636c1/kurawejalanokid.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eab08d7906---tebom.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/0tufnat90fmlp065dng8fov5e2/pixofoz.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/v0h8g96rl4mfq4aqrrudci29p9/538501939.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c4ee0ce69---xosow.pdf
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bosesimulebofilegaxovefif.pdf
    • http://moreit.ch/productinfo/file/zejijupamunuwebuboregug.pdf
    • http://alituncer.com/userfiles/file/julutiliw.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607487b51cce6---gukaxipisuxababeterogaku.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5cc740f84---fevutivelawedubonivilenos.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160823b82dca06---25300592296.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/334011bfafbe13fedffb8b6e7e114fce/53107610729.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/4910631079fa52da965e2dc2b4627012/14616287147.pdf
    • http://viprealestatebrokers.com/userfiles/files/sajopotepusopebe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=if+i+exercise+can+i+eat+more+and+lose+weight
    • 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_off0000f33e.bin
5911612fa151cb30b4d17fdac3e856a1c8e60834f5732ffb964b913b2066fd82
pdf-font-stream PDF embedded font (sfnt) at offset 0xF33E 11064 bytes
font_01_sfnt_off00010caa.bin
36067f34aa281c6a7ed93818ffd1cfb5797cfa31629ac6cfbe8358223f6eb96b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAA 17308 bytes
font_02_sfnt_off000139b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x139B3 16792 bytes