Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb84e602fc27dec1…

MALICIOUS

PDF

88.4 KB Created: 2021-09-15 16:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9cde4495d4cb47e4a86d1718073cbca2 SHA-1: 2df4c21d76bbcf0a3dd2788b1c3a177e10af3318 SHA-256: eb84e602fc27dec11b50f99fdfc11561e1f374735b4a3ac160cabfe5eb27e7d4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, including one pointing to a raw IP address, suggests the document is designed to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is part of a link farm, likely for SEO poisoning or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=9+songs+movie+streaming PDF link annotation
    • https://nestsearch.in/admin/uploads/file/21930429011.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/56838063818.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/zaditiweto.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/kc8dh712p0nbpe0s079lfd7j94/lizob.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210913_081635.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16141660e8d8b0---babujijelijizojowiler.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/38280008760.pdfIn PDF document text
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/56723581287.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613f209c9636c---wedovaserejojed.pdfIn PDF document text
    • https://fong-cai.com/upload/files/89274984072.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/97195450717.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/xuremajexoxexolaw.pdfIn PDF document text
    • https://bloc-immo.com/images/ravixej.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/82262814610.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/lukobiwaxebuxu.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/fomuji.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a2142bf9d---zevixu.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/161392a1cae4f7---jemixupuresilapu.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/tasupela.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/43263670922.pdfPDF link annotation
    • http://podolsk-kondicionery.ru/upload_picture/file/luduza.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/90599952162.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/gisajenobesaxadadatiweleb.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/dosegale.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_off0000f459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 18084 bytes
SHA-256: 7c196f0ff52213bf73e8bf25f26e3c66f6d7ac7ee2bd38c419470df9779e380c
font_01_sfnt_off0001236a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236A 10544 bytes
SHA-256: 9eff2f4cd49251f7b166613f87f643375925f1a7827c7f0e7c3c3e5f2ef42525
font_02_sfnt_off00013b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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