Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c89a8b1f4a3626…

MALICIOUS

PDF

78.0 KB Created: 2021-08-30 06:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2b61e6bdbf0cf7fb8b3f841d9f4615a2 SHA-1: 78825e95f1ee50ff352ca5a048fd44768798ed8e SHA-256: e2c89a8b1f4a36269ae5533b860b7b8867d62f2d435e1382652dbc3cd97cf28b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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
  • 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://queure.ru/uplcv?utm_term=most+common+cause+of+fatal+anaphylaxis PDF link annotation
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a800da9091b---lusejodivifavitixuvuruni.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/sipig.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/lufomik.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/30829783345.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/1f4aa3e317774ae9e0170d1cd22da8e7/bevilipoxikokotove.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/kelowak.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/6187635242.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/90a6a5b6c6b55c09c2d3fd5d75adee6f/zedejuwamedimedufawuziwa.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/65708901682.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/xawepuvexivukigelip.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/68gvtfcha7jag93fsu9o15cjjm/38016310961.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/57926741813.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/82927862007.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/darekugoxinikuruzuvatiji.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/5921318446.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/vedesiwilutataranil.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/jexubipukakikotapetosow.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16108d7752e5a4---32278969179.pdfIn PDF document text
    • http://cpils.com/userfiles/file/janopemotituvakapewitekev.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/viwujupipafasibexu.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/6152805347.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/wutobolaniturer.pdfIn PDF document text
    • http://advicetao.eu/pictures/file/gilabaluvemoxutebemisi.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/betoligewesifokosagoz.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/vabajinutatikuzo.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/53932729920.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_off0000cd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD10 10952 bytes
SHA-256: 27e6bb9e714b75a36b0e6604a380858fabe433c690eb99fdb42f1fbf36fbce7e
font_01_sfnt_off0000e656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE656 16604 bytes
SHA-256: 8fa2565f14485381c75ee6c8700c0466c85bb65889e06eba30c041e9896c6aee
font_02_sfnt_off00011126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11126 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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