Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd205bbca7e9b265…

MALICIOUS

PDF

62.3 KB Created: 2021-10-05 23:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8e05657c3f5037c19527c3452785b140 SHA-1: ca7caa81d598d1debeb13d73e60ca1f636c7df8f SHA-256: cd205bbca7e9b2652e9d8b62a04c5b093b26a569a84e7dca15d11e78113ab50c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9142

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 https://limpiezasinasel.com/userfiles/files/80073114418.pdf In PDF document text
    • https://listapp.in/ci/userfiles/files/bamanixim.pdfIn PDF document text
    • http://betentour.com/sites/default/files/file/30235232528.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/41664674821.pdfIn PDF document text
    • http://licausi.it/userfiles/files/vabolaw.pdfIn PDF document text
    • https://yunglin.com/uploadpic/files/tabakuwuz.pdfIn PDF document text
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/39175687875.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16159d8603bf7e---1729199353.pdfIn PDF document text
    • http://fastbeatbattlerider.saint-fun.com/assets/upload/files/65694682564.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/grf1pg99l6uiq7nr3s3odse7tl/wofamu.pdfIn PDF document text
    • http://space-edge.com/upload/files/xorezotopubuwijaxir.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/2854861826.pdfIn PDF document text
    • http://aokunoil.com/ckfinder/userfiles/files/13979883463.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/91353090326.pdfIn PDF document text
    • https://landi-bg.com/images/file/97310808411.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161538688bbae4---kikanitalewulu.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/ruwutukutokepagoju.pdfIn PDF document text
    • http://alpes-maritimes.proximeo.com/ckfinder/userfiles/files/sufesamo.pdfIn PDF document text
    • https://aahs.givingplan.net/sites/default/files/editor/file/49608668971.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/80487633328.pdfIn PDF document text
    • http://ed-union05.ru/files/file/29363993120.pdfIn PDF document text
    • https://ewt.cz/res/file/lifimowobiwerud.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/lomevaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=athens+county+clerk+of+courtsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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