Malicious PDF — malware analysis report

Static analysis result for SHA-256 69edb2a8c6ded6d8…

MALICIOUS

PDF

72.5 KB Created: 2021-03-26 13:26:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce18c1dca1cf05fdc74cf215256a07e9 SHA-1: 24af60c0ba0bf94a6481777f2ec087fe32116507 SHA-256: 69edb2a8c6ded6d87853d63ba978b138d7917f5fd3cd80081ae30b4eecb056ce
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a malicious intent. It contains numerous external links, with a primary focus on creating a link farm. The ClamAV detection as Pdf.Phishing.Trojan further supports its malicious nature. The embedded URLs suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=emma+lazarus+high+school
    • https://xijoxamapapi.weebly.com/uploads/1/3/4/3/134337958/kusupa_sebupogosori_jodurekeletu_juwafero.pdf
    • https://static.s123-cdn-static.com/uploads/4529281/normal_5feb99a709223.pdf
    • https://cdn-cms.f-static.net/uploads/4369782/normal_605ae1fcbda76.pdf
    • http://lazotub.mywebcommunity.org/zujugisiwimitusetus.pdf
    • http://vegifeda.mypressonline.com/60541153683.pdf
    • https://cdn-cms.f-static.net/uploads/4464070/normal_6016c5212ddc5.pdf
    • https://cdn-cms.f-static.net/uploads/4465556/normal_5fea15c2a8c47.pdf
    • http://tadugebakonuged.getenjoyment.net/archicad_21_step_by_step_tutorial.pdf
    • https://cdn-cms.f-static.net/uploads/4379489/normal_600da5d4681a0.pdf
    • https://cdn-cms.f-static.net/uploads/4467030/normal_5fd9fcfee4e5d.pdf
    • http://tejidirexe.mywebcommunity.org/malupijatenigabezijok.pdf
    • https://cdn-cms.f-static.net/uploads/4462980/normal_604183e937ff4.pdf
    • https://desebenenoda.weebly.com/uploads/1/3/5/3/135348916/940037.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_283916ceb1a543b2bccbbe53cdc22b54.pdf?index=true
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_a9c8214f9d0c4f1b9230293cec86405e.pdf?index=true
    • https://fb1cd387-549b-40f1-a5a4-67fd65d29bb3.filesusr.com/ugd/4200b4_aa08090db2ad44cb8ca24c834a7d349b.pdf?index=true
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_587b1e0f07874898b1e5168c1bebf755.pdf?index=true
    • http://duxegejuw.atwebpages.com/temedevutoketolatojenatud.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc40.bin
d4f11ad50519ff7971832e6037a0c1134190576c577ce1967440ef522a313578		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC40 5220 bytes
font_01_sfnt_off0000edda.bin
fab2714bafca949c6a235f57495690cbf7db14b4ccb55d9d7a350de7f9f1e416		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDA 11812 bytes

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