Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd1e2cafeefb4f2…

MALICIOUS

PDF

71.3 KB Created: 2021-09-30 15:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5732ea7518243e2436ac86d740fd7820 SHA-1: 92c3b2aef0209e1e9f6b6382b575338833878e95 SHA-256: fdd1e2cafeefb4f27175b4fe078ecdca33af69f4ffc6bd7e1c455d31725f199e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious content or redirecting users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent. The numerous external URIs suggest a link farm designed to distribute or host malicious payloads, likely intended for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=toeic+grammar+exercises+pdf PDF link annotation
    • http://jfhconsultancy.nl/userfiles/files/lamubefefisofer.pdfIn PDF document text
    • https://kaimano.it/file/74601039099.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/juzigubivururimifez.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/93955964703.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/11841456667.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/desifalefavowenifos.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613be48616440---50364176336.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/nisunibojo.pdfIn PDF document text
    • http://beganijewellers.com/ckeditor/ckfinder/userfiles/files/musipevavezawaz.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/sonizofakiwasowirirowugex.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/fadufunitale.pdfIn PDF document text
    • https://ginniglobal.com/uploads/file/44674554726.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/78015556397.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe57590ae2---mijoziveloseze.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/maluwopunozemivererinu.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/petozozijeketabojokizozi.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/rojenixariwu.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/seninidugijural.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/raripavejedilu.pdfIn PDF document text
    • http://systempro.kr/userData/board/file/lerenoxiridimatepitovag.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/79993556417.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///69786791676.pdfIn PDF document text
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/98026543848.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_off0000b506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD18 16376 bytes
SHA-256: 389b2332ae7fb77db6e9550b80389444afb03838c89e6d0d5583c07c680d4b7e
font_02_sfnt_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 10780 bytes
SHA-256: ca4042fbddf054238ee78c93e48f3417cc2d3bf1298c38725a9f5c34777939a4

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