Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6da6f779ae58fe…

MALICIOUS

PDF

75.4 KB Created: 2021-02-16 21:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d8e88ee2948310218e6fbd2cc7f7735c SHA-1: 1caa8c1bf45f3304161ddf052075558964f8a056 SHA-256: eb6da6f779ae58fe3387b6725ab3d0f18e90f9de829e7731279f595cc598abf7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to obscure domains and appear to be part of a link farm designed to drive traffic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=how+to+pair+amazon+fire+stick+controller PDF link annotation
    • https://cdn.sqhk.co/xuteposidobi/ciengev/pinball_wizard_elton_john_lyrics.pdfIn PDF document text
    • https://jamojibo.weebly.com/uploads/1/3/5/3/135349767/2c1f01b4.pdfIn PDF document text
    • http://namixojebeku.iblogger.org/call_recorder_free_for_samsung.pdfIn PDF document text
    • https://ledosixekesi.weebly.com/uploads/1/3/4/3/134313849/pukixujoraguvi.pdfIn PDF document text
    • https://cdn.sqhk.co/vixonafom/H2jcZMK/1120885496.pdfIn PDF document text
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/ac1cb35d397.pdfIn PDF document text
    • https://gilurumujeluzem.weebly.com/uploads/1/3/1/8/131857598/xenolumaloku-safimisejaxor-bekotevapale.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/3651049.pdfIn PDF document text
    • https://dofudovi.weebly.com/uploads/1/3/6/0/136092117/begixepewul.pdfIn PDF document text
    • http://lidobexi.22web.org/40396924271.pdfIn PDF document text
    • https://xumodaniteged.weebly.com/uploads/1/3/4/4/134480563/kikuwasirateg-fudel.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/gomaxod/99355999078.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/99752318448.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/eu_variation_guideline_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/47984329296.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/cara_lagu_gratis_di_iphone_6.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/68795810800.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/computer_courses_website_templates.pdfIn PDF document text
    • http://mifumupesa.rf.gd/apb_reloaded_pc_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/yellowstone_wolf_project_annual_report_2016.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE921 5328 bytes
SHA-256: aa2ad84198914b7ed887927f2b28dbd00350414132383a96c1d6b31fc8a5d632
font_01_sfnt_off0000fb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB49 10652 bytes
SHA-256: 15c574103bdd16549c125d5b56d8cd088cda7bb8677c1a245f923a558487f115

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