Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e094ffc7785d57d…

MALICIOUS

PDF

76.7 KB Created: 2021-07-09 00:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b1a559eb99a5d13250a4496e94e784f SHA-1: f451be10a87ea9be05b36e2f334f747074baeb69 SHA-256: 5e094ffc7785d57d42cc0ac55d2b0dd687338542d1ee48621f57c9f385f1f018
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content or for SEO manipulation. The presence of numerous embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b38df8f5f14ac814a65dbcfff1b8d9f4/nokuzelokodatimunubifun.pdf
    • https://towa-aaa.jp/userfiles/file/webogivelamurugulok.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ed560593f---8558353179.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/d5sr418u9ehfru8doanaqt2gah/kolimedot.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4de2a943f9---50503472422.pdf
    • http://bularz-auto.pl/images/userfiles/file/vuvevetezefipamitipi.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9c997b2c29542f9b1fff9c23b5d97a48/16651668989.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/gpbs1emjq0gtnjn3v11mhsgako/zesuseret.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/cf8eed0dae463645bac415f4d80172a3/gusadovejoxi.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/10fba864a874f69a1f36d198df63a568/11302622613.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/bf1b2fe78f1a02978ad6d5d488d7ed35/60181582655.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/fmqbtdr0kisj2vf0tpb1ho6t86/40133246686.pdf
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/jikarofafu.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/bc6075c35069c5eb4645131bbc71639c/getagefasufatogit.pdf
    • https://motelandratecuci.ro/userfiles/file/jatan.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608829f200615---33020775991.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ef559dbca---tunefolemamajisal.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160ace6db0007a---getowevegijobevu.pdf
    • http://ankurgroups.com/userfiles/file/95376994388.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/feb721c95bcc7a10400e018bfc3669ad/tumakuba.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff50f7188a---xibubuzujidefuzisefexaso.pdf
    • http://ceresasrl.it/userfiles/files/lizapakekimuwamujagego.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/57dc9d7c79ddd30e20cc51f7d84d962d/lujirezedezot.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=pathfinder+form+fillable+character+sheet
    • 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_off0000c74b.bin
efc42d1b8e4633fb4d95bbbaa761cb75685af415581acea7c78851250a26c01e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC74B 17204 bytes
font_01_sfnt_off0000f451.bin
235e4a5c93e39e1b99edcac6ed3576a6e7136b9a6cad0c9daef7866303f777e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF451 10884 bytes
font_02_sfnt_off00010d3b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3B 16792 bytes

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