Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8f2eb3022abe69…

MALICIOUS

PDF

75.6 KB Created: 2021-02-04 03:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9ab6de6c339a93d03414b2fbb44489e7 SHA-1: e40346db2cf9172907ca423a50afffe3afda90d6 SHA-256: ee8f2eb3022abe6987b6c157d93f210f068a2ab402f8d954243e34d382d9d3e7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the PDF contains numerous external links, likely to facilitate phishing or malware distribution. The embedded URLs point to various domains, including 'jacksth.ru' and 'nunitew.rf.gd', which are likely used to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jacksth.ru/123?utm_term=black%2527s+law+dictionary+pdf+free+download PDF link annotation
    • https://wesuzijuto.weebly.com/uploads/1/3/0/7/130740493/zezatigafig-pewabodat-nutisuda.pdfIn PDF document text
    • https://rebopugosoge.weebly.com/uploads/1/3/5/3/135346619/d99543925f707db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387235/normal_6000fc5f9cd0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425009/normal_60004defa34d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425227/normal_60070ba1bdc13.pdfIn PDF document text
    • http://exemplpusj.com/1942_mobile_mod_apk_unlimited_gems_download9a8iv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_5fced5f819bf3.pdfIn PDF document text
    • http://tehnotop.site/english_aptitude_test_samplef7z7a.pdfIn PDF document text
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/19c676363cb29.pdfIn PDF document text
    • http://samo-katim.ru/population_pyramid_stagesjxz0b.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/1280534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471988/normal_5fe8c13946e28.pdfIn PDF document text
    • http://topstudy.fun/8059772106286jam.pdfIn PDF document text
    • http://italiahot.fun/jijarijomerokuzonotosodobwmfl.pdfIn PDF document text
    • https://rabusefikitane.weebly.com/uploads/1/3/5/3/135314736/juzaditureg_megovi_fimazotekepedi_jekexexuvavez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nunitew.rf.gd/wobaserubolenoro.pdfIn PDF document text
    • http://maguvunu.epizy.com/english_grammar_exercises_with_answers.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_off0000e5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F3 5492 bytes
SHA-256: ddbe6683a6acc2e0a1b8d928eb82b37dd239986fd66add4f89d1e5d862f52159
font_01_sfnt_off0000f8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D4 11300 bytes
SHA-256: b5c8981cbac82a2d983f7954035369c825d5211c640af6269131952fb4ff35d1

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