Malicious PDF — malware analysis report

Static analysis result for SHA-256 997f0305070d8c1f…

MALICIOUS

PDF

82.2 KB Created: 2021-09-13 11:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a0fdbabf2af33e03d7599e7c7b47b640 SHA-1: bcbda8b3da2462ae4aff7b1dccbbef821dd7b1cc SHA-256: 997f0305070d8c1f937c6a5f419856bbb3b6518614f9463a7149aed593d3255a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to potentially disposable hosting, suggesting an attempt to obscure malicious destinations. The embedded URLs, despite some being marked benign, contribute to the overall pattern of directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://aescantabria.es/upload/fckeditor/file///57439617734.pdf In PDF document text
    • http://jl-vacuum.com/upload/files/xamebukosud.pdfIn PDF document text
    • http://tomdythai.com/userfiles/files/67948424065.pdfIn PDF document text
    • http://lg-palette.com/upload/files/27671722074.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/zaridowisepovetegadunu.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136746f59401---geparojekaf.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/36837187082.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/92817618145.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/19110738474.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/gasekopatobakigoxorevagen.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/zeruvuxapadiwuwebexani.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/oa04iiell1u4gla0jq4tkaib95/tomudusokuketewewojepane.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/77223207149.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/jimisij.pdfIn PDF document text
    • http://protectakoteasia.com/ckfinder/userfiles/files/71809453362.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/92832065993.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/kosafutepemojujewaxe.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/fepitomuzaza.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/95481011463.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/82661403234.pdfIn PDF document text
    • http://come2menorca.com/images/file/wefopigawotetoganesel.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/rijuxak.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/29789513741.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/86710140185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=best+offline+game+mobilePDF 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_off0000dc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC89 10648 bytes
SHA-256: 6a8f76973b0fafd7f8b2e1fdf62d979d7e2552aee6c1e06bd0f7b5743bb2d799
font_01_sfnt_off0000f4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 18004 bytes
SHA-256: fa55869766cc018c03adbc914381c5d415be06438fb2331580c7f639338d0cd4
font_02_sfnt_off00012376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12376 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.