Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d87920b5594732…

MALICIOUS

PDF

79.8 KB Created: 2021-03-07 09:36:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a51e3067d6e35cbb3fac191c26a64a3c SHA-1: 4664c450539ae8696eea5ac67642b7d98353905b SHA-256: c2d87920b5594732a28781d06a3dfa22d84bd06432bc9f349329a4414edbbc41
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://midufefew.ru/award?keyword=what+are+the+ages+of+kohlberg%2527s+stages+of+moral+development PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497697/normal_600a447c7529b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_601df8b64d913.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/fix_snowblower_near_me.pdfIn PDF document text
    • http://meroxisawifagu.mygamesonline.org/larebafu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420019/normal_5fc834b6039e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427274/normal_6004557d4c04f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/template_powerpoint_2010_animation_free.pdfIn PDF document text
    • http://fedonefekipide.myartsonline.com/seven_years_lyrics_natalie_merchant.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/30440632612.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/apple_airpods_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d326829-04cd-4be3-a23e-ed57091a65b3/hp_officejet_pro_8620_print_error.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/android_for_windows_7_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/79487626835.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/51722224299.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/gemoruxejesigusaso.pdfIn PDF document text
    • http://kubomefewofumim.atwebpages.com/jewigawemupokinulomif.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/21299107210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/346c66a5-1e0d-4343-8526-864f6b9afd82/25161151459.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_off0000fa5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5D 5768 bytes
SHA-256: c47b5fca3bb2988fc4b0c8999817fa1ef1c9f229e082fa3aa6dce1f868fe9705
font_01_sfnt_off00010de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE9 10428 bytes
SHA-256: 0e478df381fc6f1093deecd93509a38f15ab887bd049f8507733343f7d4b98e8