Malicious PDF — malware analysis report

Static analysis result for SHA-256 300e457675bf656b…

MALICIOUS

PDF

84.4 KB Created: 2021-09-04 06:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d67b19b6eb0dbf1665cc4665d3e8192 SHA-1: f21a5d17044132cdc00667f689cfc0b17e54a3ef SHA-256: 300e457675bf656bf18993f615b66d7be7bce82e56efa97b7f16ebeb2ac9172c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or facilitate phishing. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://kristinanamaste.eu/files/31212336285.pdf
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89871852389.pdf
    • http://vino-charlie.cz/userfiles/file/nigojenasasabedizu.pdf
    • http://sotel-perm.ru/site/file/sodipoduvewu.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609566afe5723---13329883563.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea0c86a23a---kizukero.pdf
    • http://improntediteatro.it/userfiles/files/91256791134.pdf
    • http://zerosquareonline.com/file/kolomifabezinepivunan.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/161298ecb60eb3---59468935615.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/gvkbo538s5q7746000f44o9e9f/tujinoperoxovidurotinuwut.pdf
    • http://akinmedical.com/uploads/file/sorifogegoxiguv.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9430eaf3af---gazujiwe.pdf
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/94905275556.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/auh31oqb724hccuslsclk5sadh/kalejuvetusanineguxoravi.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/0bd3ec88798735e054bae999ac365fdf/fisuzenanikozefe.pdf
    • http://cudicio.it/images/file/vexonileruvagaromisuvoz.pdf
    • http://fatimaartwork.com/userfiles/file/menarigojolonesavebov.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd6d6a8d99---lepikumagozot.pdf
    • https://cihangirhotel.com/upload/ckfinder/files/6451894245.pdf
    • https://floridagreatescape.com/media/file/dalokoribimomafir.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/dbf5a509d141bb1c634c539873c3a758/jabogorajonoserobepi.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ede29a7b43---fevorew.pdf
    • http://blow-w124.com/js/upload/files/51057297375.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160810fa789a7a---73421903581.pdf
    • http://volamtuyetthe.com/userfiles/file/1928665430.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/01bc5c77f1b0bd92ac8f9f5ecf70a7b4/36266409257.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ma%C3%B1anas+milagrosas+pdf+descargar+gratis
    • 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_off0000de6a.bin
d04f86e0579f9110d6e6cdb79f188b45e9fb896f92a724e5319327ede8f8de9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6A 11160 bytes
font_01_sfnt_off0000f7f8.bin
b988764c2149f2fab3d3f00fba52011d3dd7ed8591120e51032ac44274095318
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F8 19392 bytes
font_02_sfnt_off0001297f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1297F 16792 bytes