Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f99d671c210515d…

MALICIOUS

PDF

72.3 KB Created: 2021-09-15 13:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e6f53183357b5b8f4c3cecbe2cc2cc52 SHA-1: e8cb191f31a5fa985999cd389c39e54c3a1082fb SHA-256: 9f99d671c210515dc6c969afc2f85dac3d002ba5d6bc8ee29a315e677d1bc13d
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://queure.ru/uplcv?utm_term=windows+7+pro+sp1+iso PDF link annotation
    • http://pololanna.com/user_img/files/gelopowamujuzexanakof.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/semazepev.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/lotofazuvugejiwuzejapusak.pdfIn PDF document text
    • http://kusistoconstruction.com/userfiles/file/kesegekotisunilom.pdfIn PDF document text
    • http://apartmany.cucoriedka.sk/data/files/33409404296.pdfIn PDF document text
    • http://gardatrans.com/content/Files/19191788487.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16131daa9b2209---poxaxujusebew.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/17218507078.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/74757686651.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/jofufukosizakom.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/84570598982.pdfIn PDF document text
    • http://contelex.it/userfiles/files/38349791265.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/bibav.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/11679383452.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/febizilebaxebodox.pdfIn PDF document text
    • http://krupongs.com/images/file/wolimevemezajobawapa.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/67608556367.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/19017771238.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/zonevaduzo.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/28428739231.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/pinexodamivilub.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/gowage.pdfIn PDF document text
    • https://easyown.ddproperty.com/datas/files/85473226904.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_off0000b613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB613 18528 bytes
SHA-256: ba3a988e653a4da006b1fec70332f31a9c4dc6f2bfca82ffc8ae2cfff8db3201
font_01_sfnt_off0000e519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE519 10128 bytes
SHA-256: 559f1e150d6f9830c972dd7eed3b8223020591afadc854dffc7c848d2d04c721
font_02_sfnt_off0000fbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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