Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce83a4555a67b5e…

MALICIOUS

PDF

68.3 KB Created: 2021-01-23 15:18:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-07-02
MD5: 5a56690815c50ebf5be02e67b0f5caaf SHA-1: 34dda8cb65e5f041eabea4686209f40f74a1b184 SHA-256: 4ce83a4555a67b5ef5bd197532ba9f649a38edf219244e0b20474e2dc47d1f6c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=matlab+cell+to+string+matrix In PDF document text
    • http://xazivigufimu.22web.org/free_traceable_sight_words_worksheets.pdfIn PDF document text
    • http://rexapeduke.66ghz.com/16667643510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459784/normal_5fc8652818174.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://davojuke.epizy.com/literally_the_guy_in_the_pic_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/eclipse_aspectj.pdfIn PDF document text
    • http://kajomeki.epizy.com/aarariraro_song_kuttyweb.pdfIn PDF document text
    • http://waverotefiwob.epizy.com/53080275556.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/ludegezulalewe.pdfIn PDF document text
    • http://xenivut.epizy.com/apa_style_guide_blog.pdfIn PDF document text
    • http://numapev.rf.gd/bagubi.pdfIn PDF document text
    • http://kenubuw.epizy.com/cyberlife_first_android.pdfIn PDF document text
    • http://fijazatomowov.epizy.com/adobe_after_effects_pc.pdfIn PDF document text
    • http://jawikaginixuxuz.rf.gd/vajiwuzusuzatep.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/rafomelokakavefesaniz.pdfIn PDF document text
    • http://nemebikox.epizy.com/wattstopper_ut-_355_manual.pdfIn PDF document text
    • http://dijinisefiregot.rf.gd/aldi_miniroos_program_leader_session_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/xakoxok.pdfIn PDF document text
    • http://gojejamajutemus.epizy.com/92089598047.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_off0000ca29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA29 5332 bytes
SHA-256: dfdfef2b25f43d9769a3ac86f8ec479f00ef06995bbe1fcfed674af8b840ea5b
font_01_sfnt_off0000dc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC42 11688 bytes
SHA-256: f74d08fa15c7faadca64647eb0d27c6e947b165b2a78a14a8f0b366013cdd7e3