Malicious PDF — malware analysis report

Static analysis result for SHA-256 183e27f4f55256a2…

MALICIOUS

PDF

73.3 KB Created: 2021-05-19 03:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 787ca6e4619504d1de73be7bfc37b869 SHA-1: b457f7e7da17428e602b8c337138d4f32ba57abf SHA-256: 183e27f4f55256a270a41a965ddcf2519098301102a7672daec798cc54c0a31a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links pointing to compromised WordPress sites, likely as part of a link farm to improve search engine ranking for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains references to 'glitch the casino in gta 5', suggesting a lure to entice users to click on the provided links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9591

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160838701312f3---seladolajimujosuvelivo.pdf
    • http://accessiblevehicleservices.com/userfiles/file/nuboxijavomuvevek.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6cb7dbb05---91436436172.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608075429e15e---ranozonixekojumage.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/9616mb2ivjcp17oofo0v3qriv1/pazapamepibiki.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0d9f7c376---gunotiburuwipop.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/8a487a3ca44b3547ba4edee5b47df0a4/jejixasazenane.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/e38af015a900b501f738af4344d6ceb1/11608133128.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/bvgcc1527l6q7ibgq0i6eoh9l5/90864112509.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607847d3ed952---jukumuwilinareg.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/2i6c4latvn8o55u3s1jeh5mel7/52702390594.pdf
    • http://a-kamen.com/userfiles/file/zunabefebepikipupedo.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608280cba7740---tijegilenu.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16070a4142dbab---83256927858.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe73924447---tenivopu.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f838465759---89143904228.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a49999f38b5e32f2bcac49bf13afca2c/34568514771.pdf
    • http://montaze.org/democms/userfiles/file/mofejokevurani.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+glitch+the+casino+in+gta+5
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011684.bin
ea0a42f80fc3d072843f9107cfd58fab97bb8571c6af83e40bd945274ba16587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11684 5144 bytes

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