Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ccffbd97279c6f…

MALICIOUS

PDF

86.4 KB Created: 2021-03-26 08:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 791487bf9f89a9202128b9f862bda283 SHA-1: eecde83bb6329b5f2028162ee4f969584f304a4e SHA-256: b2ccffbd97279c6f41544f91668f4baabe94822f656f8f36ffef21f8552247aa
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a link farm hosted on disposable infrastructure, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users into clicking malicious links, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/wix?keyword=fancy+pants+unblocked+game+world In PDF document text
    • https://cdn.sqhk.co/keridola/hgZjggf/let_s_guess_meaning_in_urdu.pdfIn PDF document text
    • http://bemoxanomazopix.iblogger.org/nokaposavi.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/meyidQe/18660977539.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/8mjeBA5/mepomol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465949/normal_6001ce6f1d59c.pdfIn PDF document text
    • https://cdn.sqhk.co/sobetevod/ggg9Whd/61178153516.pdfIn PDF document text
    • http://jufanurozud.getenjoyment.net/une_autobiographie_agatha_christie.pdfIn PDF document text
    • http://tipijijajofupi.sportsontheweb.net/bilingualism_and_multilingualism.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/uhihdge/50223704330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443802/normal_5fe717e43df85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_601c60c6a058b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rujeziwuxe.rf.gd/53861538892.pdfIn PDF document text
    • http://pisonepegosa.myartsonline.com/dd_3.5_druid_handbook.pdfIn PDF document text
    • http://kojajopi.epizy.com/407725794.pdfIn PDF document text
    • http://luzazawa.rf.gd/wood_carving_merit_badge.pdfIn PDF document text
    • http://didavinevago.epizy.com/all_about_space_magazine_download.pdfIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_6691246012f540a4a6c81ddb05fffe73.pdf?index=trueIn PDF document text
    • http://detademuvokite.epizy.com/50704343291.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/learning_french_by_podcast.pdfIn PDF document text
    • http://veridipu.rf.gd/avery_label_templates_for_word_l7165.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_79749a759d63429d96e9354949664885.pdf?index=trueIn PDF document text
    • http://godidab.epizy.com/tisawofinajuvasevivudi.pdfIn PDF document text
    • http://tokukemojitiwil.epizy.com/android_bitmapfactory_decodefile_assets.pdfIn PDF document text
    • http://pudosuvosav.atwebpages.com/aporias_jacques_derrida.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_off00010f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F68 5744 bytes
SHA-256: 66c7b44eba83eea58b7dc241d9cfb131ee78cd241b3a7d111cef1ef61208b6f9
font_01_sfnt_off000122fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FC 12012 bytes
SHA-256: e8f5a3c0cf8c960908f398ba50737130bf43a3c477c98eafef3b46f4865fdeff