Malicious PDF — malware analysis report

Static analysis result for SHA-256 6423993ddeadae8a…

MALICIOUS

PDF

81.4 KB Created: 2021-02-02 14:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3802b0c031c82d6936b2d73c88713e00 SHA-1: 1a8a76e03e9638d2e11b819150f294cfc81ee168 SHA-256: 6423993ddeadae8a91e501750125079250b8d0b4d867425a7340bf53705b67a2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/123?utm_term=abbvie+immunology+scholarship+reddit PDF link annotation
    • https://kikoxelila.weebly.com/uploads/1/3/4/3/134335894/4634909.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/jigchiv/15168559673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390350/normal_600da33a84f17.pdfIn PDF document text
    • https://gebekogekikak.weebly.com/uploads/1/3/4/6/134694855/tezutagolixe.pdfIn PDF document text
    • http://topepuxabi.iblogger.org/aplikasi_story_saver_wa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393883/normal_5fc6b824ddaa5.pdfIn PDF document text
    • http://complect-tech.ru/happy_birthday_cake_image_makervj9l7.pdfIn PDF document text
    • http://nibobokil.66ghz.com/95012132855.pdfIn PDF document text
    • https://wokozizexufam.weebly.com/uploads/1/3/4/2/134234926/jilebefupomiva.pdfIn PDF document text
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/8663966.pdfIn PDF document text
    • http://uuuuull.space/between_commensalism_and_mutualism0e9w7.pdfIn PDF document text
    • https://wemosixalaku.weebly.com/uploads/1/3/4/3/134315089/d25a04728203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_600c0c3775c80.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuxifonodine.epizy.com/5441553339.pdfIn PDF document text
    • http://pewesinelukaveb.epizy.com/8374763559.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10094 5776 bytes
SHA-256: 62f7f8192d79eed68bdefb2e80b59b7227862931310d393415683fae07560a7c
font_01_sfnt_off0001141a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141A 10760 bytes
SHA-256: bf413398ea83a59ea0da5576f7d5291503ceab61c5c5d0aba1cb01e0d54f0d47