Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd5894a8e9db28f…

MALICIOUS

PDF

86.1 KB Created: 2021-10-09 10:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 60682f6bed75902e9defcba131a43b20 SHA-1: 194b6905ea8d265d50648878dcc0753311e56bf4 SHA-256: abd5894a8e9db28ffb3b201b109c17fd266346cb8729396188d321906494f648
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://wastran.ru/uplcv?utm_term=causes+of+traffic+congestion+pdf PDF link annotation
    • http://fatfailogistics.com/fckeditor/files/file/musizulixofe.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/45490d7d026183f6b9da946e49059253/mezej.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/dosafuvojobobavezik.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/pazafiwemef.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/kaxopolavavik.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/27352696559.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/fevisumodekafatas.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210914_0A4466DF83B92629.pdfIn PDF document text
    • http://salt17.com/userfiles/files/lisefavegokejutugupidojam.pdfIn PDF document text
    • http://zzquansu.cn/d/files/bozegakobinite.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/49912716878.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud/files/zotiwemimigugajalu.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/savef.pdfIn PDF document text
    • https://revive.fashion/upload/files/gemegeledu.pdfIn PDF document text
    • http://i-tos.com/userData/board/file/kixibo.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/8158501529.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/binix.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/jitivuxapopuraz.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/11414480249.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/zerobuj.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/wejarugatub.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/82499059884.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_off0000e763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE763 19672 bytes
SHA-256: ec4850a0c917c4c91434788b06152f799934eabb8b71ca8c16ee916691c04eb0
font_01_sfnt_off000119d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D8 10880 bytes
SHA-256: 3510b0d0f1d41b751c36af4293ce33d01437b3eaad2e38689c8547ef3d02c689
font_02_sfnt_off000132f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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