Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9ddbe4d94330dd…

MALICIOUS

PDF

73.2 KB Created: 2021-04-01 19:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3c3b949b39a43a783a105f2bfd35d940 SHA-1: 7de3d0237a2927ac69a15c7cdb4b25f739aae34a SHA-256: 5e9ddbe4d94330dd121b163869d5097fb7057ab30a78a2314304f565d1cedddb
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to disposable domains and known malicious redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=samsung+un32j525dafxza+remote In PDF document text
    • http://mojadejazisapa.sportsontheweb.net/jotul_f_600_review.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/tolebukujatipaje.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/water_bus_map_venice.pdfIn PDF document text
    • http://steblin.pro/vufojatorexofaps08.pdfIn PDF document text
    • https://leviwajij.weebly.com/uploads/1/3/1/6/131637177/nunaxetetezepuv_bawitab.pdfIn PDF document text
    • https://voliguxuzewiwa.weebly.com/uploads/1/3/4/7/134762967/7065488.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/matchbox_book.pdfIn PDF document text
    • http://finomimetafix.sportsontheweb.net/frequency_adverbs_exercises_with_answers.pdfIn PDF document text
    • http://paypallsecurity.com/lineage_2_revolution_cheatsfshsh.pdfIn PDF document text
    • http://ionatr.fun/instalacion_calefaccion_gas_natural_precio_aproximadorwsd7.pdfIn PDF document text
    • http://warajuvevuv.medianewsonline.com/addition_connectors_exercises.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/que_es_cianuro_de_potasio.pdfIn PDF document text
    • https://cdn.sqhk.co/ferobisuw/hgkC2hg/aspire_rewards_kysse_offer.pdfIn PDF document text
    • https://cdn.sqhk.co/bozogekeji/hjOiggc/head_basketball_download_mac.pdfIn PDF document text
    • http://comp-arenda.site/hdfc_amc_stock_forecasty16f5.pdfIn PDF document text
    • http://leledup.mypressonline.com/which_weight_goes_where_on_a_grandfather_clock.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/gekixadonuru/pokemon_the_power_of_one_full_movie_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/tera_chumma_me_chyawanprash_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/counter_terrorist_hack_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/thanksgiving_phonics_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/workpro_brand_review.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_off0000de18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE18 5912 bytes
SHA-256: 44b01a360f93bcf5eee5e881440e7c6fc93f2e28cb98f7dc6d52c3379ac92478
font_01_sfnt_off0000f23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23B 10540 bytes
SHA-256: 2d2644127e916b36e3a8d9a1fe8cb354ee2454745343ab86b3b04e046ba9db5b

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