Malicious PDF — malware analysis report

Static analysis result for SHA-256 b050690be628528a…

MALICIOUS

PDF

82.0 KB Created: 2021-09-16 11:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3438e959bce2c0e82f5a4e51813d1755 SHA-1: 8bfed4427d9a08cbea71f0f804001b823d040d78 SHA-256: b050690be628528adee6bd4aef6cfb5fa7c5265bb843c4a764413c0c57ffe7cb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it's designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://irlanc.ru/uplcv?utm_term=super+mario+bros+nintendo+apk+download PDF link annotation
    • http://ascensionchina.com/userfiles/file/17938106037.pdfIn PDF document text
    • https://soechi.net/userfiles/file/bizapepedekafek.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/wewanopatujuku.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/venajusafadamedufaxan.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/52006714054.pdfIn PDF document text
    • http://viorina-deko.com/images/file/mipes.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/83266439095.pdfIn PDF document text
    • https://renetravel.ro/images/files/kuworodubovibekopuruzi.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/tobajaxufikig.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/18627290477.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13890602032.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/52772993596.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/vabut.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/wexopejaduzowa.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021090501464673499.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/73763532974.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136fc9dad238---2595442330.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/ganomutugonidafudiwoke.pdfIn PDF document text
    • https://www.piramideidiomas.com/ckfinder/userfiles/files/xisekoxupupofodiwewuruj.pdfIn PDF document text
    • http://ottuk-e.org/userData/board/file/81101361159.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/130f7846241bdd1187ff08a33940734c/10909520461.pdfIn PDF document text
    • http://floralojistik.com/userfiles/file/88727383525.pdfIn PDF document text
    • http://www.beverburcht.nl/upload/files/53809025057.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_off0000da02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA02 18192 bytes
SHA-256: 28fd2a6691ee239f203ae4ef78dc727a797ce99aecf3cd20e50a2783ee2dd082
font_01_sfnt_off000108a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BD 11044 bytes
SHA-256: ed69de1a9539b31e72ab4628e446d689dae968894d3bafc70587c06963798d3c

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