Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66ab2b2c5c480fc…

MALICIOUS

PDF

110.5 KB Created: 2021-05-17 22:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d0545227f5eaa01b5cfbc01eb165d267 SHA-1: 6a1f3112f24cd4a3bb02c17c17dfedebd766d3ae SHA-256: e66ab2b2c5c480fc8404bc37a9e445c8e3b56cc3b679a1d7cf5617635c90cc67
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary URL, https://maypoin.ru/strik, is likely part of a malicious campaign. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/strik?utm_term=introduction+to+south+african+education+law+pdf PDF link annotation
    • https://giravegide.weebly.com/uploads/1/3/2/6/132681237/dizomevoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391340/normal_60464477b060e.pdfIn PDF document text
    • https://talokawibameze.weebly.com/uploads/1/3/4/0/134000376/9733650.pdfIn PDF document text
    • https://lowarimubabop.weebly.com/uploads/1/3/4/7/134712264/ritozap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_605531698881d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_600dc69065fe4.pdfIn PDF document text
    • https://pidilamobojuri.weebly.com/uploads/1/3/5/3/135310388/nazereruj_tuxiji_neduronibo_bapolurazofetiw.pdfIn PDF document text
    • https://sawagifavemon.weebly.com/uploads/1/3/0/7/130775832/laveradenaw.pdfIn PDF document text
    • https://damasixo.weebly.com/uploads/1/3/5/3/135322107/0171ea05b4.pdfIn PDF document text
    • https://diniporugixufov.weebly.com/uploads/1/3/1/8/131856235/wuzesufagulilu_kotozogijovusi_bakid_nenepoga.pdfIn PDF document text
    • https://lipigilukezi.weebly.com/uploads/1/3/5/3/135347924/3741395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_600d642e36c5c.pdfIn PDF document text
    • http://juwapes.22web.org/27442982631.pdfIn PDF document text
    • https://gavuwili.weebly.com/uploads/1/3/1/0/131070236/6564525.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/kavifunaruvi/98188033504.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/mefazavugikupof.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/when_was_the_movie_a_river_runs_through_it_made.pdfIn PDF document text
    • http://nimunofat.epizy.com/72967599502.pdfIn PDF document text
    • http://vajowevub.epizy.com/avancemos_1_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/98245574180.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/34607190396.pdfIn PDF document text
    • http://bozudob.epizy.com/zabofobirewifujumapi.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/16943659180.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/96523978815.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/rabegivef.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_off000173ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173ED 5272 bytes
SHA-256: ed552c1b84cba430bfe159b4db14fb73002ecd0444b79fdac17127598c3fd059
font_01_sfnt_off000185e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185E6 11116 bytes
SHA-256: 774e112942b3d218939293eb08fc1f4798983bd43e1c59dd525c8d55f7f2f445

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