Malicious PDF — malware analysis report

Static analysis result for SHA-256 15cfc830886396e3…

MALICIOUS

PDF

73.7 KB Created: 2021-02-24 16:17:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ada26c35e2ed7db94ff491c8fe1fa22c SHA-1: d79f7a2ec8984a167b67edf48f422bf41fd14937 SHA-256: 15cfc830886396e3ee83b9ca9ef34a43a55f41e5a6965d89fa6f1df9b49df49b
196 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
  • 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.
  • 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://jottigo.ru/award?keyword=air+force+1+yellow+and+black+high+top PDF link annotation
    • https://ximepovefuvaxoj.weebly.com/uploads/1/3/1/8/131856443/gasexawuz.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/a7df8cd6e5b92.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/siwifadol.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/cGdhgii/faleponunuxijufimunarapem.pdfIn PDF document text
    • https://rejobasagiletez.weebly.com/uploads/1/3/4/6/134642313/gijez.pdfIn PDF document text
    • https://cdn.sqhk.co/fatobaliv/fNEUZid/bird_box_2_book.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/uhgc7XX/vozapujofid.pdfIn PDF document text
    • https://seruvexude.weebly.com/uploads/1/3/4/4/134404645/233b524c9085105.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450728/normal_5fe1980cae16d.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/dusined/performance_appraisal_goals_examples_nurses.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/ruzafilejejazumo.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/xusaxapexojaritejuwedan.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/introduction_to_aircraft_structural_analysis.pdfIn PDF document text
    • http://desiwafinu.epizy.com/lolaxanobif.pdfIn PDF document text
    • http://sumafalonedap.rf.gd/backup_restore_android_without_root.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_off0000e31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31B 5680 bytes
SHA-256: 0bb072abf82ce663797c415e107e1bcf00dcf44a492c87640b09bc9155ccc69a
font_01_sfnt_off0000f691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF691 10396 bytes
SHA-256: 30167be39b9b7393260bfacdb3b97e4abfb1a7c879b48670aa5f9fb70e441c40