Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6aba8e5672840b…

MALICIOUS

PDF

79.0 KB Created: 2021-09-02 07:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7e3800a90e5545b06c570b50c3e998ad SHA-1: 7d6f58af3e542d9e30649d797cba5f8c443e075e SHA-256: ee6aba8e5672840ba057271094c5d44a7dcae2cce387164ef3021dededa8eb4c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a phishing lure, specifically impersonating a delivery note to trick users into downloading further content from external URLs. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this, pointing to a mechanism for distributing malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://allytemp.ru/uplcv?utm_term=delivery+note+template+free+download+pdf PDF link annotation
    • http://jcbcharpentebois.com/ressource/site-image/files/fotozigowano.pdfIn PDF document text
    • http://shriramashramps.org/userfiles/file/sarozutezavapera.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/kofitivovanaxogufomadaked.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/84672922244.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/161162031ba83b---51062684740.pdfIn PDF document text
    • https://progin.ch/ckfinder/userfiles/files/96931038611.pdfIn PDF document text
    • https://activepymes.com/pub/file/pujugikaxefobatajuvugukup.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/fepirefuxuzi.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/nupejivezata.pdfIn PDF document text
    • http://envigest.cz/upload/file/kamezala.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/52231457604.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/kesesukowawubedagezawox.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/subowelenanisat.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/levagatenesezov.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_off0000ce53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE53 18360 bytes
SHA-256: d5a7d333a52d4523d28ac7f7e513dd01f43dddfbf2ab3a6b8c0944afd765f6ad
font_01_sfnt_off0000fde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE1 10760 bytes
SHA-256: 415e92fbe75383a8d143a9b48fef811d68c1dfc5b10ff51a6912b44b32f5e945
font_02_sfnt_off000116a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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