Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b62f97c20b0214…

MALICIOUS

PDF

93.9 KB Created: 2021-03-28 08:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5ddf7c3539568f79038db9065300477b SHA-1: 74929148d2632aec24365e53b82a2a37541d30de SHA-256: 09b62f97c20b0214e1f70951928d7b1072801b7f61db443e3606fae35daeeed1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to external sites. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, often delivered via spearphishing attachments.

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
  • 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/123?utm_term=ultrasound+guided+axillary+block+nysora PDF link annotation
    • http://lusolakidareve.mywebcommunity.org/70202258869.pdfIn PDF document text
    • http://hotloveme.online/35406179949mki8i.pdfIn PDF document text
    • http://zixivudu.getenjoyment.net/argumentative_essay_about_internet.pdfIn PDF document text
    • http://dobofozepop.mygamesonline.org/fubadulobetixawenaw.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/rental_agreement_format_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/Dheicif/87300994078.pdfIn PDF document text
    • http://wajofima.mywebcommunity.org/english_bible_kjv.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/MjcXMTU/swamp_attack_2_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/fyiiujh/gukojagumuz.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/pavububoxojulapowidokugaw.pdfIn PDF document text
    • https://cdn.sqhk.co/nimabugokofa/ijif9ic/38028417688.pdfIn PDF document text
    • http://lonemap.medianewsonline.com/31336225677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485152/normal_5fe6db171c05c.pdfIn PDF document text
    • http://daimontimur.org/how_to_get_net_working_capital_from_balance_sheetamvy4.pdfIn PDF document text
    • http://bottlechainworld.com/super_fast_go_kart_for_sale4nxhz.pdfIn PDF document text
    • https://cdn.sqhk.co/nexapebevux/d8icHFA/b2b_marketing_plan_template_ppt.pdfIn PDF document text
    • http://goodsun.space/dark_souls_3_hardest_bosses_including_dlceasmd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475586/normal_5fe50e95e6372.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/63386b01-9225-48b9-af35-9d576748124c/vitijenamuzitopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/282db663-f214-428e-af10-ef91d819b5f8/temisumumexala.pdfIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/wotalapemov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd35617a-6966-4de7-92cb-4f5fac58b487/sisegalenimimaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cdfb73d-302f-4492-9399-1ad1e13bca17/31451504491.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_off00012dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCC 5472 bytes
SHA-256: 5e784586efa59b9c635bdff86e18d4699a87a87dfc6b96dec21a8aad28bd56f8
font_01_sfnt_off0001407f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407F 13232 bytes
SHA-256: 348c10559228baad5727c123ef291e6c5d07e4c0fcf14f5671e51633bfae33b2

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