Malicious PDF — malware analysis report

Static analysis result for SHA-256 c213ca3992614746…

MALICIOUS

PDF

86.0 KB Created: 2021-07-06 15:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c5a225796e383d93a60f351512dd634 SHA-1: 702b65fe2f4c60295ef6224a7693a2d83c1625f6 SHA-256: c213ca3992614746e5b1cfa02f06ad0c5541bf8a74437f72b40d019cebf72feb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also functions as a link farm, directing users to multiple external URLs hosted on potentially compromised WordPress sites. These links likely serve as a lure for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/4bsgr7qoehl7hcf40j39r98lo0/94106834778.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608537ee29b5f---47716621635.pdf
    • http://greatnice.club/updatefiles/file/26140735436.pdf
    • https://studiorampinelli.com/file/11517726956.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/6c665329b31848865e27cf2305f4daa6/mojerafisakuxofem.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea118727a0---sitakedefi.pdf
    • http://newbusan.net/FileData/ckfinder/files/20210629_7460DA6AF56F894F.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9apa1qfae2l9r9i2pa5amfkve3/51312912989.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb563871cc---mevumewoxotozifedawunigo.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ca066650c81---52884451229.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/a30f432c84be2249d60bc3e7490ab894/58127574888.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/2c6b0cb5e1300b238414f7f3a063efe6/29164296784.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083dc2071368---39947682110.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bba73164072---29925609262.pdf
    • http://kiuanai.com/userfiles/file/mubazasodonixademikux.pdf
    • https://cesiedizioni.com/userfiles/file/risuzasivijumonosalek.pdf
    • http://coinproject.com/userfiles/image/file/16143127367.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160759da810d90---pobubigugumasile.pdf
    • http://cnkls.com/userfiles/file/1625288009.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f8f772ba6---kejapunu.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/beb8e510b6e82edac53ae4e03abc5b1c/59381588143.pdf
    • http://tantos.jp/js/upload/files/mavigixubawabeki.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=air+fry+wonton+wrappers
    • 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_off0000eae1.bin
8f70840280d2c935e622221bfc040b3a3b46ac9602f8b4c1120ed0c24491d2ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE1 10484 bytes
font_01_sfnt_off000102f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102F4 16792 bytes
font_02_sfnt_off00011b06.bin
801342ca664a8cd83f47c7ee0cb3a7a00b5cf58f88438820963dbbfcd0400c55
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B06 18164 bytes