Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e473f5f49d84333…

MALICIOUS

PDF

89.4 KB Created: 2021-06-27 05:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 21258d8ec471ec3c5c94a389db1c5ebf SHA-1: e2a162c2d2e527790055ace352d2d9d56b2272c4 SHA-256: 8e473f5f49d843339a2414509b4c6ba924fde6e9c59c979d897ece60d8326ea3
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple websites, many of which are hosted on compromised WordPress installations. This pattern is commonly used for phishing or to distribute further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098ba5d989eb---viwomadivuxonexeru.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aafb3db7d---silidesopokimerosoki.pdf
    • https://viboot.com/ckfinder/userfiles/files/zotile.pdf
    • http://abwplazaview.com/uploads/files/kuwojupaligerem.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a5d88926a.pdf
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/35374459619.pdf
    • http://macautemple.com/userfiles/file/68970666470.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/d32f5f640bcc485c45bcebc6957cb310/68432920765.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff9956ac55---64072178719.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/9a6f62e1994680686b9966ed5ec04c2d/83904895115.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c2f78be57---timeji.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2e0924a20---72172341102.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/2a8d12c759a29c744fa46c6501045e42/50839716982.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/k54imuj4nnrr6deqb7h088e552/tupinaruzojirikozebuti.pdf
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/zisonibijolola.pdf
    • http://www.verneteco.com/ckfinder/userfiles/files/1314993660.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/e4d5d5a38c131b66803ac1c21c5e680c/97659500465.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5639ee1e3b---61746753826.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/44d96cc92f41bb52e73fb2aac07bd647/54578561535.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/fbd1a9678be3de642e0a2e8f5cac9750/tolamewabanosus.pdf
    • http://ilksolar.com/Images/Media/files/57399985275.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/0192c794b7eb3c9b74ce1e9976f5c08f/buxupisuxojulogajomedu.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8190458d1---kusalomuwiwo.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/n87sadkeh4ui3sbco3ohu3q4e0/56455817542.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/5f14725eb534cd6b8aaa8baa4c347920/14763289724.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=unblocked+games+9
    • http://pro.ovh.net/~tribuene/images/banque/file/rutibisozum.pdf
    • 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_off0000fcc0.bin
5ab72495d71e818b4ceb8e3e7818828f4032ba7e781cef2f4da27d5683af2bc8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC0 10832 bytes
font_01_sfnt_off0001158e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1158E 16792 bytes
font_02_sfnt_off00012da0.bin
fb4e0ada27ae17984dda7d7cb660841b55c3b11976560495352818b20343b94e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA0 16568 bytes