Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e129d334c6d0a6…

MALICIOUS

PDF

67.0 KB Created: 2021-09-26 16:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 784dd87a396f021d65c178bedfe35cf4 SHA-1: 4163b983de8b6d011f5f49c8051ea70bfc6f2da5 SHA-256: e5e129d334c6d0a6a584854e8fcd77db1b6283092dd2bf8851b4628a19f88522
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious content or redirecting users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The numerous external URIs, many of which appear to be link farms, further support the conclusion that this PDF is designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=love+2015+online+free PDF link annotation
    • http://kanizsakran.hu/userfiles/file/tekawoxezerumiwikuxix.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/55606651291.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/52444398505.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/kaxomokikov.pdfIn PDF document text
    • https://geniodelweb.com/file/redasebowudoletupibatami.pdfIn PDF document text
    • http://newbiesites.com/userfiles/file/vipepulemum.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/pesagutevememibixetoga.pdfIn PDF document text
    • https://5of7edwardstreet.com/assets/media/files/mitebapexajiradaxokitatu.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/fawotivuw.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/gejovimep.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210915183943321.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/xotuwujelarud.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/nukokobegotonegukese.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/tefogibezotadutonite.pdfIn PDF document text
    • http://lex.tj/img/file/beditodepol.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145319e9da53---piguwaposovu.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/pukogurozapikevebow.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-17/20210917204846191707.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/69831439952.pdfIn PDF document text
    • http://anm-av.de/uploads/files/wafadosu.pdfIn PDF document text
    • http://packamate.com/userfiles/kugebufomexitoxarureladun.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_off0000ab87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB87 14384 bytes
SHA-256: 17b1cd45fb63fb61fa9d9b5cf4a4918d74a3d18083d5f6420ee490522401c75c
font_01_sfnt_off0000cfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FC 10228 bytes
SHA-256: 478929adae6b830db84d0ac89d1044bc69fc3068eb6c3d4871019489c09ee9f8

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