Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ea956f80284cec…

MALICIOUS

PDF

87.6 KB Created: 2021-07-17 16:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: aad62b4e0c424721e9c3f73104f62dde SHA-1: dea927d6785915a4a1f1c917f9ad8f190027fed1 SHA-256: b7ea956f80284cecd9fb64759cd7a6394fcafa2a5d7b798cea19ecd3609cdc32
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites and disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed to appear legitimate but hosted on disposable infrastructure. The embedded JavaScript likely facilitates the redirection or exploitation process, contributing to the overall malicious intent of delivering further payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://extracam.es/app/webroot/arxius/file/94168285083.pdf In PDF document text
    • https://angkortaxiservice.com/userfiles/file/zabisimegixe.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160992e224aebd---jupopad.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/8f755c918d1c9f91923b443edd36644f/rolivemugatekezokap.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/7d7f477ff682ab0f43399fe527f9d087/20791354276.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/879a1368b6ab8a6373b46404efcd6d21/powipu.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609db965e4bec---xowatedazoraveziroludumug.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607308e285aa2---41195735971.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/667663dbe9c7dc21c518c8e7ba7ed193/49301931585.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/98216821975.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087898f595c9---zetibamovavotirexibaso.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/91cba5cd8ad10a2b4809d5220d7b492f/10539537574.pdfIn PDF document text
    • http://pgnsualumni.com/clients/872691/File/69506590130.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/a6e913d17ac1df91d2092d371a6a2308/fexabapakipikavug.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/38707186401.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/f885ca2c15ad2c3118121aa1c0d19edf/wufumorowiv.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1d67d4d4a---94919246791.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/jpunsic1ui3to7ucr0tbh1ic35/nagubogufalo.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/a22f6db914c2ce95cfb69fe6ec9b717b/10057244479.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/kjf8pe3m55pfov00akee743ltb/8412916004.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909404acd88---seropakiniregusibu.pdfIn PDF document text
    • https://brod-plovdiv.com/images/xagemolawufeka.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/96042823361.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/welunopemuvowavitowogi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/def5e824563388e66fe0ae8e0b0c43b3/41751316785.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/nonanorilebolevedujazi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=burgess+falls+state+park+tennesseePDF link annotation
    • 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_off0000f4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 16816 bytes
SHA-256: 6a4e9ba826cd76313037dd63db8e6ac25a661b3ac574c9f0c1823b374b7a3288
font_01_sfnt_off00012080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12080 10564 bytes
SHA-256: 5bbf36cbb147734d564441f823771aa7aaa47a758ca779f42bb8377ba2403b9a
font_02_sfnt_off000138cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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