Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14b6de00d4c5675…

MALICIOUS

PDF

76.1 KB Created: 2021-09-25 14:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ce8de7166d986f403b8983840ef6a613 SHA-1: 5f5a4c067138fa3821400524e4ae95a2bfb730cc SHA-256: e14b6de00d4c5675098e216fd5170b89186a9e857cdfe53a4f4b983406c33a6d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are classified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code or redirecting users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://autofactory-jin.com/js/upload/files/80527883389.pdf In PDF document text
    • https://loyallcanada.com/editor_files/file/sadigored.pdfIn PDF document text
    • http://onelove.cz/file/xoxukidagotalapirodetumi.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/dodibalejazivuwaveposej.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/65415957647.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/9068388760.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/puluxeza.pdfIn PDF document text
    • http://yejida.com/userfiles/file/fuvunigepefusafebal.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/gofuzukepunitopanaluxe.pdfIn PDF document text
    • https://anjingliar.com/contents/files/35321049919.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/kabolozafivuki.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16141a159c706f---bevujazimovuketusisuzi.pdfIn PDF document text
    • http://proficlim.ru/public/userfiles/file/zopopasatevewunujaf.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/69849693757.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/37727520052.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/nokejimulesudosidegof.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/99307833820.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/biludupawudabekovorojudep.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/ea3d89417a9add7fff01678bec640115/9170057504.pdfIn PDF document text
    • http://belean.pl/userfiles/file/fukunefidumudulipupom.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///xobuxitizebev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=poco+x3+pro+vs+redmi+k40PDF 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_off0000bbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE4 20404 bytes
SHA-256: 5f7951f961bc74d0330b2035b5a3453b7495e4c997195bd9c3e805fe6af87dcb
font_01_sfnt_off0000f14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10965 10900 bytes
SHA-256: b42f53b823c6395e0def5a1d0cf4744010524fb87654d6ca3cae26df2ba13e5a

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