Malicious PDF — malware analysis report

Static analysis result for SHA-256 225896e153fe3510…

MALICIOUS

PDF

95.0 KB Created: 2021-09-13 01:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0d58d34dc2d7bde847ce71ce6685abbc SHA-1: b48a1712ed6cbc2525c85f15af7a557a881518b5 SHA-256: 225896e153fe3510c28ebae6785016466c5e4de14ef74385b83a1894c2d3aee9
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, suggesting an attempt to redirect the user to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://almoheetmanpower.com/public_html/userfiles/file/97346287614.pdf In PDF document text
    • http://gaestehaus-am-erlkoenig.de/img/editor/file/18993693006.pdfIn PDF document text
    • http://quangcaovuanh.com/vietkiendo/upload/file/pejopiziragigavun.pdfIn PDF document text
    • http://art-ball.net/files/file/24901181914.pdfIn PDF document text
    • https://rcot.org/userfiles/file/47582293545.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/daruv.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/tavirujokufex.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/riluzovikuvenoruf.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/37039451400.pdfIn PDF document text
    • https://quatden.vn/webroot/img/files/79044089712.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9b1f8b7a6---mebamovigaguxav.pdfIn PDF document text
    • http://zlzljc.com/uploadfile/file///2021090411344956.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/widawexuxirumafe.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/vafeduso.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc91ec52f0---wezawozovebizitevepidow.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/nixibinaruwidi.pdfIn PDF document text
    • http://decaiyun.com/upload/file/2109051517063565927dj06s8ukbhf.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/25814642311.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/1298474382.pdfPDF link annotation
    • http://urduhadith.org/survey/userfiles/files/wunewoda.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/48222918506.pdfIn PDF document text
    • http://highdesertrent.com/newsite/images/uploads/file/ruzekomibezetogonabugo.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/jefuwokisofuvobanat.pdfIn PDF document text
    • http://chipgene.com/image/files/20210910_021723.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/xanosizokatefaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=superman+man+of+tomorrow+123moviesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001089a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000120b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B1 11144 bytes
SHA-256: 5691013ec4534b256731afdd6f7f792d433742866904b01b28f234daf9eff653
font_02_sfnt_off00013ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE4 19584 bytes
SHA-256: 54a87e69ca7c0aa5fb066c27f11eb78432667a122eb1cf7d65c92580603aa800