Malicious PDF — malware analysis report

Static analysis result for SHA-256 219cf3c5217ae516…

MALICIOUS

PDF

85.4 KB Created: 2021-09-15 13:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7ed3f3e247343c412465168e27135f37 SHA-1: 59612f4c2fb7baa7c7f608ed41726e0f2fdb16ee SHA-256: 219cf3c5217ae5161cf1fd4f9237d11fc11582cf22d0137a7215f65d584355c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs that form a link farm, with several pointing to compromised WordPress upload storage and disposable hosting. These links are likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://garglob.ru/uplcv?utm_term=how+to+make+your+own+rom+hack PDF link annotation
    • http://orderkiwicafe.com/uploads/files/79512552752.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/26650954163.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/godesufuxokesonifaperar.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613819808a5a1---34623813714.pdfIn PDF document text
    • https://menu2uplus.com/images/file/8075840090.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/xexal.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/4b8efc61bf290dd0c4b397249a4ed8b2/30550891641.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/kawutawo.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/luzegojukolulurozenigu.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/46104586000.pdfIn PDF document text
    • https://chambres-lannion.fr/userfiles/file/18175068109.pdfIn PDF document text
    • http://goldmustang.ru/files/files/24080171400.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/ninikitefulupozaniduve.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/wowikikigijikexesuzogen.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/nowolizavobaxi.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161412cdf02d36---xaraxiguvepusigijerid.pdfIn PDF document text
    • https://hoalavender.net/upload/files/tonopojivil.pdfIn PDF document text
    • https://tmtteks.com/files/bivurafab.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/eddf1661b35b69b9e656c1cd82e6bbb4/xemixosesisabesakideru.pdfIn PDF document text
    • http://packturf.fr/files/7819767176.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/lijeneweworeki.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132de192664f---56522187580.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210914063605.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/wumujosozoxiwebudisubuk.pdfIn PDF document text
    • https://chptravel.ir/data/file/rekimijino.pdfIn PDF document text
    • http://nature-revive.org/files/file/lafusomakazex.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_off0000e6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F1 18844 bytes
SHA-256: a7c2dd346c97090fee6f62c8ac5763f38244f20bef6340d444bf0059413376f1
font_01_sfnt_off00011805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11805 10572 bytes
SHA-256: 0790ee9a955b0c931c640138f76dcc2b9ae627f43914b2300b4095b4f31910f3
font_02_sfnt_off00013002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13002 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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