Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9dd0b9fa61853f…

MALICIOUS

PDF

75.8 KB Created: 2021-02-20 02:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6afe5571681f69782b5d723d18ced613 SHA-1: 14c8566bd27a1d8cc1d4d5c85dc3e2d5a465de5c SHA-256: 7e9dd0b9fa61853f889cff48f6b12e2a7a97a2fade7f90d947e28c14a8aee14e
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a tactic to disguise malicious links within a seemingly legitimate document structure. No scripts were extracted, but the presence of external URIs strongly suggests the document's purpose is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=imagery+in+romeo+and+juliet+act+1 PDF link annotation
    • https://cdn.sqhk.co/suvezadamut/JITygcU/41271357960.pdfIn PDF document text
    • http://wiruxenolap.22web.org/49441175168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_601cf91f2877e.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/Ahjhhhb/jajore.pdfIn PDF document text
    • https://cdn.sqhk.co/dunenilufa/qMigeKx/29488837860.pdfIn PDF document text
    • http://jodesomuxuduzu.22web.org/fiwafinura.pdfIn PDF document text
    • https://cdn.sqhk.co/menekilebuz/hiiifhb/jemevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_60158d3c87014.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/Jghxwjj/71736711829.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/Aidhg58/87037087929.pdfIn PDF document text
    • http://zirisumiwuxi.iblogger.org/windows_10_64_bit_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/litigoruf/hgiaF4v/tekesoxafevatana.pdfIn PDF document text
    • https://cdn.sqhk.co/dameseri/hghggje/orange_tree_golf_club_orlando_homes_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/tefebenum/eYHifwF/v_movie_amazon_prime.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nubimopupugu.rf.gd/68973961883.pdfIn PDF document text
    • http://kalotiwinilobiw.epizy.com/lojavenivobu.pdfIn PDF document text
    • http://mafatiwi.rf.gd/16595071606.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000debc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBC 5128 bytes
SHA-256: 823a7439ca352cefa998d4365759c882a839eb306ef3fbafd1c2a19748edb86b
font_01_sfnt_off0000f015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF015 10392 bytes
SHA-256: 0b7fa03818b64af5c9bd1e02a3b3d878d87ec44939bba479f767a265145b07fd
font_02_sfnt_off000113ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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