Malicious PDF — malware analysis report

Static analysis result for SHA-256 44027f95e5509b00…

MALICIOUS

PDF

79.8 KB Created: 2021-04-19 15:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7981a9062420f58cb1e557b198c90e5a SHA-1: 9d1269d7172632416c11b7fc9a39950d88fef37d SHA-256: 44027f95e5509b0034830775a3a1f1ef8dc7e1255dae6d467c2c320f55de040c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://lozipotod.ru/strik?utm_term=does+target+have+the+game+left+right+center PDF link annotation
    • http://realwockyc.info/asus_xonar_dg_driver_windows_10_downloadgbird.pdfIn PDF document text
    • https://cdn.sqhk.co/kozuvurop/T3S4yWG/88845505448.pdfIn PDF document text
    • https://cdn.sqhk.co/xiteduva/YjjebOf/wrestling_revolution_3d_wwe_2k19_mod_download_ios.pdfIn PDF document text
    • http://genusttwsr.fun/mewaroxudc2q79.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/73822754327.pdfIn PDF document text
    • http://obzorov.site/710109615264943k.pdfIn PDF document text
    • http://pusatokolerax.mywebcommunity.org/afrikaans_taal_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/lunosupi/7icJicD/medicine_career_outlook.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/memory_angielski_dla_dzieci.pdfIn PDF document text
    • http://wujasonuvilo.mywebcommunity.org/how_to_develop_monitoring_and_evaluation_plan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d88697d-8cad-4fe9-bad8-f263ce616ee9/25653727667.pdfIn PDF document text
    • http://jaminuzifibe.onlinewebshop.net/zepumanadusazikipafo.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/languidecan_que_es.pdfIn PDF document text
    • http://rosevasejila.myartsonline.com/crystal_oscillator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8695c41-6b3c-4229-a53f-782cbfe7eb38/77387303616.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/zuritezunax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba65fb9-30fd-4b00-a6dc-c53d391fc892/weber_spirit_gas_grill_lighting_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/assamese_status_whatsapp_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefa2708-e56e-40d1-a3a3-7c75cec2e614/15932479804.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_off0000fa12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA12 5356 bytes
SHA-256: 908f221e9dbbce66bcaf0ee22b89ed4e9a3b961e7ae09a4087a22548721c35e3
font_01_sfnt_off00010c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2E 11040 bytes
SHA-256: 78f87fe36c9330fe03cc4b420f8edbfdc73de3bb4220e038e814680b46b1335d

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