Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6aaccee256495b…

MALICIOUS

PDF

59.7 KB Created: 2021-05-21 12:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5678fba01da1ac4928a3bf89d94c6478 SHA-1: 23bcff9cd10531e49ff78dc46533fe1d01d878a9 SHA-256: 2e6aaccee256495b937caf039a953650bcd04fe8de7a43ecf2643f46855861a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites, indicating it is designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these external links. No scripts were extracted, but the structure and URL firings point to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9570

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://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607900269d79a---5720536138.pdf
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/630e110b093f54b8d934edae0fbf0bc0/28437251041.pdf
    • http://aarogyamedico.com/userfiles/file/73281269371.pdf
    • http://dolphinegypt.net/userfiles/file/wimowikisom.pdf
    • https://burgas-remonti.com/userfiles/file/92694989428.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/7a898aa0bbc65a4bdba55168099bb39a/xowisoridumuji.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/1e3acabf39f7012f607415e06bae14fb/2619642789.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/593d66c8118656d51938ad4e649ef873/goxaxujel.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ba13c7f35---gowasabujok.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/d193c485895f5835a7907a547a8049f1/83788991483.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/ead7f34567c5e1c1540384f203dcecd6/vuzituwozunemogitoxetibi.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/ce3e2182ca8d2e964df35b7a4659578a/zilogabatuf.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/dmiaivr2bb13qok5cqill4esot/78464155867.pdf
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/43790861553.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/c6dd1769a9ec46de4e8fdeed45915e43/tiwogijaruvivimozorewara.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/fd10jet1ig7uft9fj3prichso5/vojegodis.pdf
    • http://aihyang.com/userfiles/file/82113211118.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/fb00307a18b0d8577f7a454303953dab/rujudago.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+is+the+legal+age+of+consent+in+ky
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf3.bin
aa63ff5b9a7acac15647eb99886a20cf822547ea2844c23cc70185273399e8eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 5224 bytes

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