Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ca3781d6e64eef…

MALICIOUS

PDF

118.8 KB Created: 2021-06-28 01:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 390a6422c81bdce5b1de780303eee014 SHA-1: ee7eb67f56f144647b78fc419b2230f814b073a9 SHA-256: f0ca3781d6e64eef5afa997f224bab1a6951425b9c2bd7ddfc73f27a029a5ecb
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, which in turn host other PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple distinct hosts and PDF files suggests a campaign to distribute malicious content, likely phishing lures or malware, through these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077d8bcc0c06---vegawanolodonimikuvokeni.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/kg7kble4p7tefnko3olsntitig/60090205612.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087273ba705a---zitego.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/rfog4pbup4it4jike3h6gs6qe1/76448216612.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/067dc6c7e1f9c55c163657b90f1d8e83/mikupuduxikapikusuxe.pdf
    • http://apvn.info/userfiles/file/46937221583.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc3c07ebe1---refovutobifolivawek.pdf
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/bezabarogajifu.pdf
    • https://pachetedeturism.ro/images/files/36261514573.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608ba9bb7533c---sezidaf.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160adc8a1354b8---nonelazuwogit.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860fdce0f98---59007794518.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609d09e626075---52026648581.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/9qpf55mocf7qlp20944bap036u/xotejisolazurek.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf0c25594---forotit.pdf
    • https://smsenerji.com/resimler/files/96767891153.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14e36063fb---mixemebuz.pdf
    • http://greer2001.com/clients/e/ea/ea56749d84c1a2d7db36d2c51c833a37/File/57564514194.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/9fe61d01d950ed98c76a7a235a6ba3f6/73911547755.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1483b8fba1---97793175328.pdf
    • http://pronobile.de/catalog/file/74733194610.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2bfe5a6bb---xafeludejijemewujof.pdf
    • http://cowmoo.org/ckfinder/userfiles/files/80868531835.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=kinetic+equation+of+first+order+reaction
    • 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_off00016b01.bin
d020c1f7c19b1731788ebaab3e41e8e3d50e21ed3430efa883ac52bde2054685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B01 19080 bytes
font_01_sfnt_off00019d91.bin
87928b82927d5bf68b82a6e5a66fc53b318b35da4023dac923d71524e5b72f67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19D91 10660 bytes
font_02_sfnt_off0001b5f0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5F0 16792 bytes

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