Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe08bb05f3c9bc04…

MALICIOUS

PDF

80.7 KB Created: 2021-04-02 21:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aee56235eb99063a591d0f28ac434ec8 SHA-1: 5c6a0fe43265fa274da445eb1a6ec532d6ef5765 SHA-256: fe08bb05f3c9bc04f9bb99dbd532defc115c29f5a349cc704df8c1a9b1f70d4a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://soxebez.ru/strik?utm_term=is+defending+jacob+on+apple+tv PDF link annotation
    • https://falugasotemo.weebly.com/uploads/1/3/1/4/131410545/libefikobep.pdfIn PDF document text
    • http://tadolonelo.sportsontheweb.net/learn_korean_online.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/system_analysis_and_design_questions_and_answers_download.pdfIn PDF document text
    • https://gujibukogise.weebly.com/uploads/1/3/1/3/131380045/7857009.pdfIn PDF document text
    • https://vebodejivab.weebly.com/uploads/1/3/2/3/132302978/5fbec.pdfIn PDF document text
    • https://dowanolisedu.weebly.com/uploads/1/3/6/0/136056386/sodafutulexijoba.pdfIn PDF document text
    • http://xinegibifupa.iblogger.org/telecharger_catalogue_oriflame_septembre_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_6011a35779b8d.pdfIn PDF document text
    • http://xelowonol.scienceontheweb.net/digital_electronics_multiple_choice_questions_with_answers_download.pdfIn PDF document text
    • http://zebiripu.mygamesonline.org/mixowoxuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489240/normal_60552968d79a2.pdfIn PDF document text
    • https://pofexetebi.weebly.com/uploads/1/3/4/5/134592759/fodidolu_gasetokexozi.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/06802ed93fab96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414502/normal_5ff24c87a4a26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasewevabudumu.epizy.com/ladorifivofanadugowuto.pdfIn PDF document text
    • http://tubujozuvos.epizy.com/9797790594.pdfIn PDF document text
    • http://merowijesajov.epizy.com/hands_on_machine_learning_for_algorithmic_trading_free.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/fanofeti.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/12094711792.pdfIn PDF document text
    • http://mabezaze.epizy.com/7309821813.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_off0000f720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF720 5440 bytes
SHA-256: d3ebc293cb9e36adb61e0a06ea8d38a0701f267b0bf2bbde77793e9ff90f4cf3
font_01_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 12632 bytes
SHA-256: 11003398bc663baee3d775dd1461a27b404bdb35f4d158ab78cc4e9fae53a59e

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