Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1e30deb0c94ee6…

MALICIOUS

PDF

91.0 KB Created: 2021-08-09 06:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bafc3e427ba46745e5464971febf0dcb SHA-1: 9feb322ce50bb879cf57441efcd8d876018d6e32 SHA-256: 7d1e30deb0c94ee6ce50a32582b708e8f59399f646b963b2aeb1e9f993aa4368
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to multiple compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content. The presence of embedded JS and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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
  • 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 http://feldbach-tourismus.at/files/xelumo.pdf In PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/ecf2c17480699d276ef733dde05cf484/porotiwusujinogopalajosi.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/t9n3a6kc3o3im2e3lipf4tmkq7/35541714674.pdfIn PDF document text
    • https://aedwea.com/upload/foto/lubekamuvotevozegelep.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c33f686ea57---24249118757.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607174f17f5fc---nozuwaxur.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/71814346656.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/zezekokizifewufirulem.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/61989791353.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd00ce6fae---48592046784.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b24abc5c540---15477748031.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog//file/xinalavowugo.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/ojuel9ma30ccu3hbg1f5ooiqos/1625531873.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d114b8e75---newubogosagabebekone.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/10640753783.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/62919255522.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/90b94f49d9d3b996a9db8ad00e95c3ad/74357542219.pdfIn PDF document text
    • http://handgun.ee/media/file/kelefurofo.pdfIn PDF document text
    • https://tigapilar.com/upload/files/pivuwojidadotidodi.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/jakukugipajakalirafuga.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/113db38befeee6866deabb36f2c20ece/2632906634.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e0588e9df---63784275540.pdfIn PDF document text
    • https://congchung7.vn/upload/file/67519076524.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/dositixuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+use+beldray+steam+cleanerPDF 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_off0000fe7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7E 10872 bytes
SHA-256: 3c0c3bd2aa77a4bddfd3153f84bde61a13364f1d98ddfb8a6c2c430da1687f71
font_01_sfnt_off000117b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B3 17524 bytes
SHA-256: 1d21f0fb691c2e014e77e24d6464d84ee1dec100eabeb41c7f4d1d5178656f4f
font_02_sfnt_off0001459f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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