Malicious PDF — malware analysis report

Static analysis result for SHA-256 b53df62a9e52c8ea…

MALICIOUS

PDF

67.4 KB Created: 2021-01-21 22:30:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5bfea08b5233f21762fd9a3a4190883c SHA-1: 7520454803d9bf048e62d15bc954b9f956b2d311 SHA-256: b53df62a9e52c8ea71d4673f8474e07b633aafcf6fca69b6583a63b05969c843
184 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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/wb?keyword=jump%20ninja%20hero In PDF document text
    • http://terubib.22web.org/45001281512.pdfIn PDF document text
    • https://site-1172843.mozfiles.com/files/1172843/duck_hunting_dog_life_vest.pdfIn PDF document text
    • https://site-1166068.mozfiles.com/files/1166068/50266382913.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ggIibjg/23684004707.pdfIn PDF document text
    • https://site-1176453.mozfiles.com/files/1176453/bottle_jump_3d_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/dPij5ih/nuroget.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/D5haE79/37060585615.pdfIn PDF document text
    • https://site-1168096.mozfiles.com/files/1168096/babedobeduvifurubuzosepa.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/wifukedot/41078186698.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/flyer_psd_template_facebook_cover_free.pdfIn PDF document text
    • http://livofos.epizy.com/zokogolipan.pdfIn PDF document text
    • http://zovawawopo.rf.gd/94834590760.pdfIn PDF document text
    • http://renumobopus.rf.gd/simple_slideshow_template_after_effects.pdfIn PDF document text
    • http://pavasokunise.epizy.com/63534509699.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/57507503252.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_off0000cc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC17 4916 bytes
SHA-256: d5346a06e6f6de3e124472718db6dbd659fec1cd329fc771bc29c522e5f489d4
font_01_sfnt_off0000dca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA3 10732 bytes
SHA-256: 2ef4252914f9fd389fe3515378b246e208f08e164a753db018aff6dfeee85d60