Malicious PDF — malware analysis report

Static analysis result for SHA-256 02451c0aa74249c8…

MALICIOUS

PDF

83.7 KB Created: 2021-09-04 23:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dd423214e1fad43bd685e3536ab389a5 SHA-1: dcba6ca53ca2a580e00ff73762e41f00a20ee28b SHA-256: 02451c0aa74249c8d950fe135a10e86e21e60fec2515aecbffaf5426a02b936f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users. The PDF's structure and the presence of embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=operational+research+tutorial+pdf PDF link annotation
    • https://wisserarm.nl/app/webroot/files/userfiles/files/98623360765.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/nupivawefin.pdfIn PDF document text
    • https://metal-et-verre.ch/ckfinder/userfiles/files/kuzafibomitelose.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/10508948736.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/5nhpi6fqiebrmk6v8ch7qdeqc5/44577616954.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/58684710019.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fce765ab8b---39077423338.pdfIn PDF document text
    • http://usmleworkout.com/files/file/mumufasiwibamenoditovenuv.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/78492381469.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/kelekeguwikibakazo.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/140415435427.pdfIn PDF document text
    • http://klpa.net/userData/board/file/xegoxabowuwugotesa.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/todurexeberuzedaxemuxi.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/3a1acd838718c146032c2474b8d2cf74/60076423126.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c1fc1f515---buluniwepifopitaxudigese.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/vogagejemi.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/bagogajazifikigariwo.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/13269406739.pdfIn PDF document text
    • http://scmsalliance.com/clients/864514/File/62762819870.pdfIn PDF document text
    • http://airfa.it/userfiles/file/bozuwalepimifiv.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/pusetix.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/4vhk8haphfnbbgh987u12i19cq/62098225953.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/70411344911.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/8693bbcc55d35b69ab9ad3c57a4e7602/fiwuravenesepujomuxi.pdfIn PDF document text
    • https://wagaskar.com/media/33421130453.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_off0000e028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE028 10844 bytes
SHA-256: d7c00484f3bb448f7b17aac20d58b96d3b6ffe2de93e3d840ae4a1d4b23d4433
font_01_sfnt_off0000f91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91D 18528 bytes
SHA-256: 7d4b1c6a5077c1964ba8fe0b9b6678d10e194c803712a97c8b9aa054ae77039e
font_02_sfnt_off00012938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12938 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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