Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e3db80c6f266e5…

MALICIOUS

PDF

68.2 KB Created: 2021-02-21 00:39:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2c011e3938a3e16429694b9162cf8975 SHA-1: 15500683ec4bdc62a2012a8ac645e63cbe55edab SHA-256: 55e3db80c6f266e52918b2183f2f80291859c3829cdd50825a7cd8a866d8e35f
136 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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=how+to+connect+both+qcy+earbuds PDF link annotation
    • https://cdn.sqhk.co/fogobewataja/IiiaOid/genavufazed.pdfIn PDF document text
    • https://cdn.sqhk.co/guvelebul/Nnpggjb/88661814172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445531/normal_60249b98c3d5f.pdfIn PDF document text
    • https://cdn.sqhk.co/nepopagugela/eQhfjbx/zasos.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/Vhdifii/ponilamezuduvosolena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450336/normal_6026ee5c757ce.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/73ibhh4/wordpress_templates_for_photographers_free.pdfIn PDF document text
    • http://copyrightshelpcenter.com/dolphin_emulator_controller_xbox_360vd7ry.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489598/normal_5ffc2361600e2.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/ioaQieI/hard-_boiled_meaning_crime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428035/normal_60017466f2f45.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/ggpEYXM/85331735033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465147/normal_5fc80b7a348c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nolagevupuxuje.epizy.com/xifijija.pdfIn PDF document text
    • http://jowemalawebabe.rf.gd/most_desert_streams_quizlet.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_off0000cd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD16 5416 bytes
SHA-256: cf084570c10b9edcb0d44afc85ff378dd00356b057f08bfec7c7edff56fbb456
font_01_sfnt_off0000df87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF87 10792 bytes
SHA-256: e154ad333b5e1d7c506bf480a562cbe2317e0575a05683f2adbb3e52e295ecdf