Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38526bf24438786…

MALICIOUS

PDF

82.0 KB Created: 2021-02-27 23:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 96683db5d4d3b3cc84b3bfdbdb6366d1 SHA-1: 84dc96ae7f3bed9611f8026362d3ad5b0aa0fe00 SHA-256: a38526bf2443878684aa709ed672d6efb3f8173efb79634072cadfd188c4b4dd
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://maypoin.ru/123?utm_term=learn+python+programming+masterclass+reddit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454822/normal_5fec7570f2873.pdfIn PDF document text
    • http://wizomokupelew.iblogger.org/xutesolunuveragom.pdfIn PDF document text
    • http://masajsalonunuz.com/2502264935mngoi.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/ocfs_health_and_safety_training_online.pdfIn PDF document text
    • http://pimipaxu.22web.org/basics_of_computers_and_applications.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389085/normal_6018885c08c5a.pdfIn PDF document text
    • http://mumijivamivaxij.medianewsonline.com/what_happens_in_a_police_interrogation.pdfIn PDF document text
    • http://dragonflysagewellness.com/zupizf3nyd.pdfIn PDF document text
    • http://erogan-encolumbia.site/281552278104i52q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476601/normal_5fdd2abb46f29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kopolug.myartsonline.com/16053247874.pdfIn PDF document text
    • http://movafomuwexowix.epizy.com/182876718.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/whatsapp_for_windows_phone_htc.pdfIn PDF document text
    • http://refewebol.epizy.com/android_x86_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/kalamati.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/14076596425.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/apple_tv_netflix_app.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/kiwebe.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_off00010175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10175 5528 bytes
SHA-256: 68ffbd3e1bb3994e721a53b83c4175c19756a32dfeb561ab3f9902cc760fb96f
font_01_sfnt_off00011425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11425 11420 bytes
SHA-256: 62c12b711a6e3de7b4a906410ca11e364055a9c1ab16fe5f704b77d08216fe94