Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1e53e0c199327a…

MALICIOUS

PDF

78.3 KB Created: 2021-03-13 20:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f906e3ce8bc5d3d0e6d519cc6e188421 SHA-1: b4e2a70554397bb619e4dff3150d74d35d30a05c SHA-256: ee1e53e0c199327a6d50a2239c01304312a8ee2c229f482eb8dd6816fa386772
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It contains suspicious links, including one to 'securitycheckingbrowservkcom.xyz', which is likely used to host a malicious payload. The presence of LOLBin tokens in the document text suggests an attempt to execute commands, potentially for downloading and running a second-stage exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://gimoguvi.ru/strik?utm_term=how+to+interview+a+new+tarot+deck PDF link annotation
    • http://webcam-model.online/52877073454jdkcx.pdfIn PDF document text
    • http://babusokojanog.sportsontheweb.net/90601905971.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/guion_de_pastorela_navidea_para_adultosodn3m.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/36573845611.pdfIn PDF document text
    • http://dujegud.getenjoyment.net/13187578205.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/90455154221.pdfIn PDF document text
    • http://bioforcecolumbia.site/furuvokugofukatujuleneg9nqu.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/losox.pdfIn PDF document text
    • http://discount50.pro/windows_powershell_ise_vs_windows_powershell0i6e0.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/7223306218261ma0.pdfIn PDF document text
    • http://keepxufi.space/borokuselofuduratog0wnv.pdfIn PDF document text
    • http://kmplitka.shop/21134123284ju7tr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/air_force_academy_chapel_wedding.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/81280545828.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/39208593947.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/93312439239.pdfIn PDF document text
    • http://duziroro.myartsonline.com/39406020398.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/80958179949.pdfIn PDF document text
    • http://domuromu.atwebpages.com/andhra_pradesh_bifurcation_act_in_telugu.pdfIn macro / runtime command snippet
    • http://lawesiwewif.onlinewebshop.net/the_new_paradigm_for_financial_markets_the_credit_crisis_of_2008_and_what_it_means.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_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 4900 bytes
SHA-256: 27bf82922fde39f1097a9543c57c8998a90e79e8acb7264637fbdfc8de582316
font_01_sfnt_off0000fbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0001045d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045D 11148 bytes
SHA-256: 1f089548d5afb3d3b578b478ec8721cd0a58ae855aa971491f62a33ddbdb5f0c