Malicious PDF — malware analysis report

Static analysis result for SHA-256 626e55bdff96a567…

MALICIOUS

PDF

141.2 KB Created: 2021-03-24 21:37:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3e9848e9baac4eb370627ff4a7ca6606 SHA-1: 24930d5d0d529f8749ddd77bdd80d511df7feeb6 SHA-256: 626e55bdff96a567fce22853d2785e652008e47e119f8c264ba7d692b5450f47
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://ponafet.ru/wix?keyword=soulsilver+kanto+walkthrough PDF link annotation
    • https://cdn.sqhk.co/nabowixufori/ODjjifJ/android_pie_network_security_config.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/CifjaRH/burger_shop_souderton_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/kiaLhaV/bones_season_six_episode_guide.pdfIn PDF document text
    • http://mbfsopg.com/36559696809o4n1t.pdfIn PDF document text
    • http://supernefritroller.xyz/18932181995eslum.pdfIn PDF document text
    • http://paganel.world/90144567641blu2c.pdfIn PDF document text
    • http://kevumoler.22web.org/27399185377.pdfIn PDF document text
    • http://converstarget.ru/tineve30d3l.pdfIn PDF document text
    • http://prequester.online/dizuvedomilobyjbnb.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/bNu8mKa/rumosiripetixutibos.pdfIn PDF document text
    • http://opt05.ru/books_by_pastor_chrisescwl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://povoxuzewezida.epizy.com/keratifokozuvalejekemarok.pdfIn PDF document text
    • https://b73db3ac-2e3c-475a-83ab-7f4668f00a8f.filesusr.com/ugd/80e8fa_ef094867d1664067b9b82a5bc6ec82cb.pdf?index=trueIn PDF document text
    • http://pivewumo.epizy.com/41556007363.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/venojuwekalujavuxaluma.pdfIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_0ab388794e9342779f8600e521378d2b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gulapore/29191482866.pdfIn PDF document text
    • https://b40f07b9-a98f-42b6-a6e2-5dc2c82ebb0e.filesusr.com/ugd/e949ea_e4c023ec605b4e86ba67c4b6766fd960.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/gobipapuxefajasaw.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/73267514281.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E31D 5148 bytes
SHA-256: 42a89301f86b83a11e5ec1edc8731adeae3a3c6a32abf465652941705aca4b62
font_01_sfnt_off0001f4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4A4 10896 bytes
SHA-256: 5ded86b937d51b1d1d234e2b50c530d1dd1cbfa3fb3d6a6bbdab00a27cec7b5a
font_02_sfnt_off0002195a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2195A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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