Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff4aac6628d0d4e…

MALICIOUS

PDF

70.3 KB Created: 2021-08-24 21:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58db3f923ac3cad8a9a5343a0f89a11e SHA-1: 127a35e48bb983e1213777f3caf38a2963935147 SHA-256: 2ff4aac6628d0d4e544b1e0472d9d05881ab68572c76b2d16727b734b2b6b99a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised domains, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9280

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.
  • 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
  • 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://bluebirdcanada.com/FileData/ckfinder/files/20210604_3D6016FBE09D1C5D.pdf
    • https://anmimar.com/royal/userfiles/file/babuditibosifoba.pdf
    • https://divinenine.net/userfiles/file/dinafibepimavukinoputa.pdf
    • http://adgroup.co/userfiles/file/35400710205.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081551651a3f---71379586512.pdf
    • https://fotobolfestmeny.hu/mvc/userfiles/file/wowudonuvogi.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ee1d0f3a3---55616739104.pdf
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/48992920578.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160adb7f548053---tesivumavojizugipufig.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/lcsthnopivo98s5nefij5icerq/jetinawo.pdf
    • http://0930actress.com/files/files/79295711577.pdf
    • https://soechi.net/userfiles/file/74744947516.pdf
    • http://tbff-bygg.se/img/files/bavonibuwafu.pdf
    • http://vieclamquantri.net/upload/files/32594664410.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc1fdbf35a---43449772667.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad3e3d5fb---mefakeba.pdf
    • http://grupopiscis.com/upload/files/gojulazolulifesolifinatu.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a91b31b7f2c---rudibematudatiketujipon.pdf
    • https://avigailpekelman.com/sites/default/files/file/wobejotenud.pdf
    • https://musikkursus.dk/userfiles/file/newomasujimakikufawumise.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/t7k0cpg3irr3s3k9mpbisrs897/mejatuder.pdf
    • https://hmanagement.net/userfiles/file/61591408492.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=clean+up+ssd
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d86e.bin
0d6af06f6383bdd864c3111dedde804a748ba6f23e89b5dee5efb062f64872d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD86E 10104 bytes
font_01_sfnt_off0000ef0a.bin
4468dde22ad3e590309fffa98bfa1e5c44167f303f348db528c7220a23d72426		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 17180 bytes

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