Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f69346c1a1443b9…

MALICIOUS

PDF

69.0 KB Created: 2021-02-27 01:28:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 19e983426c0634300df8ca9dcf782182 SHA-1: 843e731027fde5bf4d5b12cb961bd0395e56fbcd SHA-256: 5f69346c1a1443b9f01c09b30136e3c3eea089eaed2cf2da09f06fce05aceea8
244 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.
  • 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/award?keyword=n2+3h2+2nh3+redox+reaction In PDF document text
    • http://maletewidulebil.iblogger.org/14422444990.pdfIn PDF document text
    • https://gawopina.weebly.com/uploads/1/3/2/8/132814119/1309658.pdfIn PDF document text
    • https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/d125404ea1b447.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/2723325.pdfIn PDF document text
    • https://fexifetonazez.weebly.com/uploads/1/3/4/4/134492485/zazonemagu.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/iso_27001_password_policy_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447089/normal_5fcab6f1cabb1.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/dujufimowigefoju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405459/normal_60043fa8b0c22.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/white_fang_1991_full_movie_free.pdfIn PDF document text
    • https://zukikopan.weebly.com/uploads/1/3/0/7/130775822/refejujesufokij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445877/normal_6006556ab8022.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/QgjLjfj/42303158534.pdfIn PDF document text
    • https://cdn.sqhk.co/posaleren/TzOJoid/gixuvunapadunev.pdfIn PDF document text
    • https://bidiruvinevuf.weebly.com/uploads/1/3/1/3/131379477/904535f799f876.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vezexosewomex.epizy.com/windows_10_1809_creation_tool.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_off0000d074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD074 5152 bytes
SHA-256: b903473a923db07faa2959879d07309b62c69abc502178bc576342728fd96341
font_01_sfnt_off0000e1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FC 10368 bytes
SHA-256: 31dc96c75ae148a8c9e7ec21bb09082773e3479318da28eb95bb62095272d3da

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