Malicious PDF — malware analysis report

Static analysis result for SHA-256 046215bed5b2246b…

MALICIOUS

PDF

75.9 KB Created: 2021-09-16 00:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 588dfac886b19f5e04f5f005f87b6c88 SHA-1: 515a5d2fc485ffacffb63ff10e552de2078efdf3 SHA-256: 046215bed5b2246bac9098451d894b22a803b13558d6b720209244714a7bae9a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous embedded URLs, many pointing to potentially malicious domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/budasan.pdf In PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/il4rjujkhi8rl0thvg5t2dodcu/36326779623.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210911185434.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/12293558820.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/gemubuwasupizukor.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/55975028105.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/bubuxoz.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/40731815576.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/ketewovifule.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16140e537893b7---jamikafizikazizapixeda.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/mowexunakubokijorosite.pdfIn PDF document text
    • http://innersolutions-uk.com/file/sevaxevelawarutapit.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/bedipidajiwukimokatem.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/suxajetajarijeseworaxi.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/6964999069.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/kanisatanexobulesofukevof.pdfIn PDF document text
    • http://netart.hu/userfiles/file/21103010565.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/farudugimuwemono.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/nefetes.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/23863552319.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/27104223248.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=adopt+me+mod+apkPDF 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_off0000c6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A2 10116 bytes
SHA-256: 037dc928bc42c1a2d0010c410ed6572cc24d1767acf6008f6190d1659af90757
font_01_sfnt_off0000dd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3D 17444 bytes
SHA-256: fd706add8f4ba6ebe94d53e3ac218f34a9bd118cf7f44fe6becf33cadc8ed4f4
font_02_sfnt_off00010aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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