Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd12aedc2c8bb7a…

MALICIOUS

PDF

70.5 KB Created: 2021-09-25 01:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a3f2366cf374c67116aeb185387ffb9d SHA-1: e3b2b4c44b61c5effa7d1d654732b5a83a8a92ec SHA-256: 3bd12aedc2c8bb7a1e5047736c3be30b89128115485d6a94747109b71718daa1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to various domains, many of which are identified as part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of SEO manipulation or distribution of further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://bagumul.com/file_upload/spaw_upload/file/20210912160225.pdf In PDF document text
    • http://pokwuttibut.com/file_media/file_image/file/temobifum.pdfIn PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/pegevuvirawetuge.pdfIn PDF document text
    • http://sbkf.org/files/files/pixowuvujatinebopeso.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/gobamag.pdfIn PDF document text
    • https://jmclimatizacionhvac.cl/images/subidas/file/pitux.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/nisodujevarobajofesa.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/jesoropogunus.pdfIn PDF document text
    • http://pk.mo/userfiles/file/46038396190.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c53e68344a---wesiwobapivur.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/sesigiwelu.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/63751455229.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/60621328310.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/raveligapemisumexorudim.pdfIn PDF document text
    • http://unibeauty.com.br/ckfinder/userfiles/files/12981606435.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/43811803999.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/31896916112.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210909191735856002pw7ra.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210916_08506B44401E93F0.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373503c97f9---xegozon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=mobile+hacking+tools+for+androidPDF link annotation
    • 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_off0000ad71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD71 10980 bytes
SHA-256: e98ed2476004d1ea0be7dbb5f23a284d38ec53a353a377df1c383d9c7e74b514
font_01_sfnt_off0000c6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AF 17320 bytes
SHA-256: 15bea0bee8ff6c35ba54678a479f632a5e616e6702d7db39fc8ab7ff18ee0185
font_02_sfnt_off0000f2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.