Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f7f01fbb6e580a…

MALICIOUS

PDF

71.2 KB Created: 2021-09-27 06:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e07d9b8d673fe616ecddfd0cf9c1e752 SHA-1: e58da8ad8e1dedfffb794d86344658521c7a452b SHA-256: d3f7f01fbb6e580a4dcfa44342753ce30f82d573e2cca092da2e67ae027e0742
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, indicating a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=car+x+2 PDF link annotation
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/fufepipelowewigabofetuwi.pdfIn PDF document text
    • http://sino-web.net/filespath/files/20210913021517.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/kemurimafaborugidag.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/vezenatarawovilurutukit.pdfIn PDF document text
    • http://pneusmarene.it/images/file/lekitamoredefin.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/7350291398.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/dekojamugojido.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/87887877914.pdfIn PDF document text
    • http://makrostal.pl/user_images/file/jovoguxutowusawuzorolo.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/70467754631.pdfIn PDF document text
    • http://gearcon-eng.com/file_media/file_image/file/57332086888.pdfIn PDF document text
    • http://edmunditemissions.aboutgiving.net/sites/default/files/editor/file/zurutatonadadiw.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4fb6d440e---vinetidenemaxoxuzeki.pdfIn PDF document text
    • https://soechi.id/userfiles/file/43864213789.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/kavazi.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/tobosur.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/t9jlm0ji8fovmkor40cvt6rep4/zonizesisumuberusolarejur.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/mimobipabokuwedu.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/wafovatij.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/vutawubozitamujupamiku.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/95381666287.pdfIn PDF document text
    • https://cartolmania.it/file/nidelanana.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/kokibukirodamijujone.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/68268710144.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/duvekegivo.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_off0000b36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36E 18184 bytes
SHA-256: 886270b5bc9409de5fc8a393558f891ad9f86b269af38b7b1fb5a1c5b496322c
font_01_sfnt_off0000e2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BD 9592 bytes
SHA-256: 9b090470a4e58268e99a78b7b35cc9a10dc1db2b296aea8108b29db28b4c2180
font_02_sfnt_off0000f79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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