Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ae36ea1ea05d69…

MALICIOUS

PDF

65.3 KB Created: 2021-01-27 19:07:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 724f8683327dbbd9cc01eabcec7097de SHA-1: 2930cdf3ff7393d1e65ce394c02e02e9f6a945c5 SHA-256: f5ae36ea1ea05d6920ad4a7ff9fa872cf219b53902ead7ec7778294f499b0630
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/123?utm_term=farberware+waffle+maker In PDF document text
    • http://xikizolux.22web.org/71750357591.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/gcHjche/bkash_app_old_version_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5fd27b7d33cf7.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/piwegekovepebamizum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461751/normal_600d5d42a8714.pdfIn PDF document text
    • https://cdn.sqhk.co/midusuworab/hjHgjeM/zombie_strike_best_5_star_heroes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383923/normal_5fe222f93a067.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/fjchfMk/fikogupijukog.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/LchaNGU/denukiwudewotinefojidop.pdfIn PDF document text
    • https://cdn.sqhk.co/wukikanas/c8LggrQ/57842750312.pdfIn PDF document text
    • http://gitilapen.66ghz.com/162164988.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456699/normal_5fc74a26b6132.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376602/normal_5ffe87951aec4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://befokube.rf.gd/61367598362.pdfIn PDF document text
    • http://pogifovemujure.epizy.com/free_printable_graduation_hat_template.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_off0000c3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F1 4988 bytes
SHA-256: ddc048d27e197c1da29d5afe383031cafdd60cff03f5e17da18e5888a7ba8826
font_01_sfnt_off0000d4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4ED 10024 bytes
SHA-256: 43ba657ff7d63122285bba024a196ff0870457847acf533ba5940b98be2710b6