Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd2f0ec1499112c…

MALICIOUS

PDF

83.9 KB Created: 2021-09-19 02:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 99ee93e9b2238dc21ab10c8d4d51a19f SHA-1: 74c82a382f5df3ea8598dae02b18b5c1ced5da4e SHA-256: 2cd2f0ec1499112c62c9539701ac71322184e18ae9025f57df8903eb0e4ffdf7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS platforms. These elements suggest the PDF is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://huntic.ru/uplcv?utm_term=how+long+can+you+keep+raw+chicken+frozen PDF link annotation
    • https://birudongker.com/contents/files/81929130655.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/pojalamefasijagadusu.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/185e87c69fc36dde2f2377922f077344/fiwegatexikabo.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/a4b695f9030a500547ba12588f774320/zuzowaruwamurelatunuro.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/d5161921c2a45fc822bbd3bfa20c81fe/zutopofuxalukile.pdfIn PDF document text
    • https://saptabangunmanunggal.com/indomobils/upload/file/zemonepowagadupinu.pdfIn PDF document text
    • http://clingac.es/d/files/nukode.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/xubikubumiv.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/92857632854.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/bezikodutalis.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/10364287804.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/1001916483.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/jidamojitewenokobixe.pdfIn PDF document text
    • http://petra-koparki.pl/Upload/file/zorozepobokinofifibi.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/gikikarufeku.pdfIn PDF document text
    • http://gzcaifeilai.com/ckfinder/userfiles/files/202109071728237153.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/nubekegej.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/68095679024.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5e9010f92---wavinelujulatiwujowate.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135f8dd0b2f0---93568469108.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/toniwavusemutoriwapuj.pdfIn PDF document text
    • https://ip-pharma.net/data/files/maravetavo.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/sigobudi.pdfIn PDF document text
    • 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_off0000e1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BA 18172 bytes
SHA-256: e9ac105f43e90cb8c3ce8a79ba4b4cdb88778e7785a059009b9742b31b99715f
font_01_sfnt_off00011088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11088 10936 bytes
SHA-256: 7c2ec84caa4de6ae18ca361735696a9c2a0912cab54e4691986cb6aad969af4f
font_02_sfnt_off000129e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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