Malicious PDF — malware analysis report

Static analysis result for SHA-256 34689d15d95610be…

MALICIOUS

PDF

81.1 KB Created: 2021-09-10 18:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 550555451050498073deb8773ed93559 SHA-1: b345b88a6f10512dafe2fa25e093358965aa649f SHA-256: 34689d15d95610beff7adceea657ab4a32569c800dab38b7a715c2cc4b155cc6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The PDF contains numerous embedded URLs, many of which point to disposable domains, and a heuristic identified it as a link farm. The presence of these characteristics suggests the document is designed to redirect users to potentially harmful websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://metabolitplus.ru/files/file/35807373906.pdf In PDF document text
    • http://diversecityuk.com/userfiles/file/piwenij.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/pogopezuzironipomege.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/90450452231.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/tupuzoxuf.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/fazebebarufugagewovoxapof.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/72811688560.pdfIn PDF document text
    • https://pmms-online.com/assets/file/pilifijiruwukifizino.pdfIn PDF document text
    • http://efeotokiralama.com/Upload/file/60671201642.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/dexoserokisemopiben.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/4279754083.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/74878076889.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/2be3f4311435458aa62c61b9d4b8c364/53369364897.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/kininibofan.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/zolofiwoxivonarumi.pdfIn PDF document text
    • http://sakem.org/userfiles/files/toliwowapozijejitip.pdfIn PDF document text
    • http://wmsone.com/eimages/file/36074324105.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/fcdb0f9c59c1980a972d9dc4e4733c6b/ziboxewowix.pdfIn PDF document text
    • http://npk-bypassdrr2.com/file_media/file_image/file/12608986731.pdfIn PDF document text
    • http://fullx.net/files/44691884619.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/vawakuba.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/xemizovapufedorarir.pdfIn PDF document text
    • http://dezis.ru/uploads/files/bixopizeginesesamapu.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109061952451963.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/doravukatiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=simcity+download+hackPDF 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_off0000daed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAED 16988 bytes
SHA-256: 83712d22c052f188803816113ec14e225db5491c3a8984e3c0427caccccd766d
font_01_sfnt_off0001069c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069C 10604 bytes
SHA-256: c4c3f633aca640f179e0ad598ade3815834b277a762e15bfb4b08b469cbac771
font_02_sfnt_off00011eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1