Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf7a78f8336e093…

MALICIOUS

PDF

66.5 KB Created: 2020-11-14 20:06:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 17941ff8b843f327ff6c008768562bf9 SHA-1: 97c2e6839d73389eb29915cc45ecb13fa5a54341 SHA-256: ecf7a78f8336e093bc2a0fa1e02e9bc5a178c5ec9fc09a84ef6ebd55899e7054
254 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
  • 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 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=cerisea+medica+amazon In PDF document text
    • https://lusewixitakotaz.weebly.com/uploads/1/3/4/3/134385759/83fc00e9dc.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/964a2834.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/vimewixepuragegimuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5f8ba89a4b780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8936432df76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e0780aa-3994-4b6f-a2cf-b57ed0a87f8a/toshiba_satellite_c855d-s5103_drivers.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/davololepe.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/addition_and_subtraction_worksheets_for_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cefd0968-f3f2-443e-b829-42ece06e3901/26635330214.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/cambridge_checkpoints_hsc_advanced_english.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/43814857191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ebd18a3-72b4-4d00-ba80-d7b9fd7d8dea/medimecum_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/the_core_values_of_brotherhood_of_st_laurence.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_off0000ca1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1F 5008 bytes
SHA-256: 3193edfd84b8aa90cab7edd8e0570f9e3d15035a7b7e3bd8b96bdd40e55c00e8
font_01_sfnt_off0000db0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0E 10196 bytes
SHA-256: 3eb38b7e1aa8e85f840e38448688611152dcf6cbfdaa914c3494343b219a03b0

Open this report in the interactive analyzer, or submit your own file for analysis.