Malicious PDF — malware analysis report

Static analysis result for SHA-256 380ab0ba14d139f0…

MALICIOUS

PDF

70.8 KB Created: 2021-03-16 01:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d157f5b2e2da527c3c10f5a8606c91b SHA-1: b0d0a4e052504dd7de44759a6c33101927997f5f SHA-256: 380ab0ba14d139f08e5770dc779c655875cc89e509df0c20c2347c93b397cc3a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation attempt. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=seekbar+listener+android
    • https://fefojaza.weebly.com/uploads/1/3/4/4/134480993/5271573.pdf
    • https://xorodipilubila.weebly.com/uploads/1/3/5/3/135311864/5439656.pdf
    • https://tosafesixagosug.weebly.com/uploads/1/3/1/3/131383933/876f8b7c6.pdf
    • https://cdn-cms.f-static.net/uploads/4413975/normal_603ebfbb274d1.pdf
    • https://ludatigesoz.weebly.com/uploads/1/3/6/0/136050408/683dec0f2b400.pdf
    • https://zidimegaga.weebly.com/uploads/1/3/0/9/130969389/811f1e023a98d.pdf
    • https://kinijenu.weebly.com/uploads/1/3/4/6/134641264/mujuzide_gesisoveso_volokenelepu_nadekom.pdf
    • https://cdn-cms.f-static.net/uploads/4470220/normal_5fd68aa64ee4d.pdf
    • https://static.s123-cdn-static.com/uploads/4413226/normal_5fcb63ed5cc0b.pdf
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/3912849.pdf
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/rumibufalataz.pdf
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/rapogaba_gegowar_jegetadebubogol.pdf
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/bb48cc88e4b0476.pdf
    • https://vavulawukuret.weebly.com/uploads/1/3/4/6/134690424/najetazo.pdf
    • https://cdn.sqhk.co/gevolonovare/eZ6ijgi/appdynamics_ceo_linkedin.pdf
    • https://sunajekivogemaz.weebly.com/uploads/1/3/4/8/134895881/8921820.pdf
    • https://cdn-cms.f-static.net/uploads/4405443/normal_5fd67354136ce.pdf
    • https://cdn.sqhk.co/werutojij/EoOihhd/memelijasitasu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nijosinizo/rapopuxaxur.pdf
    • https://s3.amazonaws.com/jipowumat/anime_arcana_famiglia_sub_indo_batch.pdf
    • https://s3.amazonaws.com/zozofufulolig/45829027990.pdf
    • https://s3.amazonaws.com/fowonaxul/hufflepuff_uniform_boy.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_off0000d8bf.bin
a799d6b00b3f624f8ca949db119798cdee8cadaf59e7b7b04039fe7465b9119e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BF 5124 bytes
font_01_sfnt_off0000ea33.bin
5468d2153a36e4a810a002dbf958b7dc214eb00ec64a6d71a03c2145df1e0dbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 10444 bytes

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