Malicious PDF — malware analysis report

Static analysis result for SHA-256 932225a08726a6eb…

MALICIOUS

PDF

72.0 KB Created: 2021-09-25 22:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f698c54c7800b84b41042bba0a18b3b7 SHA-1: fd840430356da9557bd79e8dadee3590ba2f698e SHA-256: 932225a08726a6eb860423d48368045449cf657db7b1264d9203f6895fe97c04
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, including one pointing to 'laborke.ru' with a search term suggesting a lure for movie downloads. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm structure on disposable hosting, further supporting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://laborke.ru/uplcv?utm_term=soorarai+pottru+tamil+movie+download PDF link annotation
    • http://bdpq.hungminhits.com/files/uploaded/files/wilugimoxudunosoxu.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/govawesok.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb57b7f24a---joniserapotek.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210923014931933470bku0w.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/10879197563.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/76925479953.pdfIn PDF document text
    • http://email-database.info/userfiles/file/fivitujebin.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/danabopumu.pdfIn PDF document text
    • https://la-klamm.org/Files/files/18571910403.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/vofojuvotimimezenede.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/bebove.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/35160425314.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/92890465671.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/nawavuzilarovabowitivagi.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/94291918898.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/34326794076.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/70908263043.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/1473337786.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-1/20210901131749130697.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/danoxix.pdfIn PDF document text
    • https://jin-ji.com/upload/files/jijomunamizodore.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/pabebodinufijanotidof.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16147afc9bafb5---lavuwuwifumivarati.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A4 10712 bytes
SHA-256: 213c18037b175fb94f84dbe856e246426c34cc9311b5fc92f064e48c7441f222
font_01_sfnt_off0000ce40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE40 17144 bytes
SHA-256: 09f1030e7691c06be9686a2b8513b2097564664ab1c8f76425fe482928981140
font_02_sfnt_off0000fa41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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