Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0611d6d45f3655d…

MALICIOUS

PDF

82.8 KB Created: 2021-03-23 08:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 924b96b0baa96bec550a38514b339cf4 SHA-1: 70dafdd0f8b2ccaa17155bfd12aabceb439cbfd5 SHA-256: f0611d6d45f3655d588d1fe1de6cac78c980c35c34cf92e2f65f16287350ff5a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm on disposable hosting. The embedded URL `https://mezovuduw.ru/strik?utm_term=vizio+s4251w+b4` is a primary indicator of compromise, likely serving as a lure for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=vizio+s4251w+b4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446152/normal_6000af28888a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391340/normal_5ffa31d770125.pdfIn PDF document text
    • https://cdn.sqhk.co/futogifoku/ggifjgQ/terminal_emulator_for_android_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/oA1jeif/jackbox_party_pack_3_xbox_one_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463034/normal_5ffa3f0f8aff8.pdfIn PDF document text
    • https://cdn.sqhk.co/matozage/ShbGhgX/9409549820.pdfIn PDF document text
    • https://cdn.sqhk.co/xugiwatokax/GjdzUji/79922105433.pdfIn PDF document text
    • http://bobimesufapi.iblogger.org/duzavepifafegabejuf.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/ejaiihg/gugotogabuwulisapog.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/DjbAgfQ/nostalgia_critic_titanic_tv_tropes.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/woranarutemobip.pdfIn PDF document text
    • https://cdn.sqhk.co/remudejifi/jajcMlr/swot_analysis_tool_free_download.pdfIn PDF document text
    • http://korixoludofuguk.scienceontheweb.net/wild_animals_images_with_names.pdfIn PDF document text
    • http://tekupugu.sportsontheweb.net/zivozu.pdfIn PDF document text
    • https://cdn.sqhk.co/fudikeraz/gh4hiBF/clia_guidelines_for_proficiency_testing.pdfIn PDF document text
    • http://lesuxofozadize.mygamesonline.org/how_to_change_the_battery_in_a_dodge_grand_caravan_key_fob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410194/normal_5fc66493152cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/de_que_trata_el_manifiesto_comunista_resumen.pdfIn PDF document text
    • http://fakefujakarip.rf.gd/assentamentos_informais_definicao.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/roofing_project_manager_salary_texas.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/kemeburukis.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_off0001082f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082F 4984 bytes
SHA-256: b6385551b2fb70534b1c28680aec74c73cbfe9cb47d9654641c4eb0ac52d7db1
font_01_sfnt_off0001196b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196B 11032 bytes
SHA-256: 1a178932780ac23dcf431eed7733bc6e4fe95a43c375597bcbeee4b74ac1c756

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