Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c7402bfc3fd483…

MALICIOUS

PDF

78.1 KB Created: 2021-06-23 06:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63265fb75edb354ef55f2bec59aec769 SHA-1: b3fdc029b47f127838e6c8ce4cfd41326af809ca SHA-256: 61c7402bfc3fd483206172b456627a4b84efa2d501bd4595b9284112f7ba4a41
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The embedded JavaScript likely serves to execute malicious code or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8098

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://vipforiraq.com/userfiles/files/1063855072.pdf
    • http://vandientuchinhhang.com/upload/files/kegopeduzapuxunomewoti.pdf
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/melalobubafuliwutulav.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160972c7e8b277---xaximoxifimorelewi.pdf
    • http://auto-spec.ca/fck/file/20828234113.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0c78b3167---96902778202.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7186c5529---wusiwazotunokutajo.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/600adba40b01429966149476ff10a432/24102782979.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16076421a185f3---zobifisu.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/3ovm6h6atf4g9qd63tdk5l4fuk/punebunazekes.pdf
    • http://luckdidea.com/ckfinder/images_store/files/tukofatixelivamowa.pdf
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/fipazazabo.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/v3gfqdrikh92490br452hna0k1/dowumufiwidanibumeliv.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5257a99da---21145585980.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b85e7d07afa---jexezuvarod.pdf
    • http://wildpflanzen-planung.de/file/zivuxodalotafubosado.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=pik+pera+form+pdf+download+2020
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012887.bin
c84355bb1636ac7c425805fd0b244fb53ea9acbb320c62cbeb98491939200c74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12887 5440 bytes

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