Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0abad5ef91b946f…

MALICIOUS

PDF

64.0 KB Created: 2021-05-27 19:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef36c49e21d5a1626e3be4b60c415bad SHA-1: 6edd32503b5c88b262b559047bf8da70d6043fa1 SHA-256: c0abad5ef91b946fd17966e9b4fb238bb25870704a683ef9d0f7bd95587bbfd1
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7866

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://mangonebike.com/uploads/file/13205722924.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/8tu8tlrlfkk2s8i13uhlhe58bs/ripikebufowefafomaxaguvaf.pdf
    • http://kinel-hunter.ru/upfiles/file/29446136693.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608baeb280da7---gutoxutabiporare.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094667095c71---90337267405.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba928d4340---lebuwokiwo.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/5c4b64ac851428c1e0472002639bf02a/kaxanopajegoj.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/90922035476.pdf
    • http://absolutelyneon.com/userfiles/file/kulex.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/f4b04e473f9c50991fc7970a7cb4692f/jotogeda.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078474293c8c---5520933685.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/21jrrp2sj1nlvu82tvn2bfas67/30345587768.pdf
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/306987e037d7e81dd1e0e02ecac7e78e/55174194225.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/oi7n1fn1jgk5l53kgvj49dcrg1/lebuvitiwogizated.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160709e956c749---pitevev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=kinetic+and+potential+energy+worksheet+key
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc65.bin
9e6424f21e1b65d46132da0c41c99d46b6a129c62a4734e17e90249801e08841		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC65 5352 bytes
font_01_sfnt_off0000de8b.bin
b81e8273555b45d01ee1dd1e762197ea33cab7e9d98e38aaf36d0308277ceabe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8B 6620 bytes

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