Malicious PDF — malware analysis report

Static analysis result for SHA-256 43eeab4a142f76e6…

MALICIOUS

PDF

76.5 KB Created: 2021-05-09 21:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d0b6f15c1d3d4727a204ad871d25009 SHA-1: 7549c445c663419cb115993bed03b201bea92153 SHA-256: 43eeab4a142f76e6afe6c4310b7cc496c9b242171d3f893c2c12af621e29c711
126 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded URLs, many of which point to disposable domains and appear to be part of a link farm. This strongly suggests a phishing or malware distribution campaign. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely a phishing or trojanized PDF.

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://nipisod.ru/strik?utm_term=cloud+9+smoke+shop+memphis+tn
    • http://naturfresh.space/prefixes_and_suffixes_worksheets_for_grade_56i93d.pdf
    • https://jajonugofetafis.weebly.com/uploads/1/3/0/7/130776034/sagiwari.pdf
    • http://naturalm.space/85094498364i7fl4.pdf
    • http://gazozaxuk.getenjoyment.net/bake_sale_sign_up_sheet.pdf
    • http://drive4mclaneaustell.com/yelp_review_content_guidelinesxqe3u.pdf
    • http://runmasten.online/microsoft_flight_simulator_x_download_full_crackudbi3.pdf
    • https://xagixuruzetel.weebly.com/uploads/1/3/4/3/134319769/0e7b213fcc8e.pdf
    • http://gunenekaroz.mypressonline.com/26573804753.pdf
    • http://lorozetuwivu.medianewsonline.com/sipojakosagasazawaxura.pdf
    • https://cdn.sqhk.co/tubawonidas/gdQmPgj/coda_music_app_download.pdf
    • http://freefire-gifts.com/66707351096xq9vp.pdf
    • https://static.s123-cdn-static.com/uploads/4459029/normal_5fe40fde70306.pdf
    • http://elinekici.online/personal_fitness_plan_example_brainly7tsx2.pdf
    • https://cdn.sqhk.co/waxobakal/rjcxheW/nebavudiwewefamefure.pdf
    • https://cdn.sqhk.co/xomakonezema/a8gilie/gopikejewolojowavinitelim.pdf
    • http://islemleriniz.org/79931186164t7n88.pdf
    • http://dehydratedoriginalgoodness.com/vlookup_example_excel_sheet2wqdw.pdf
    • https://dexidete.weebly.com/uploads/1/3/5/3/135394420/paxugagumezidej.pdf
    • http://gobigs.space/suvaxegofjffz.pdf
    • https://cdn-cms.f-static.net/uploads/4425909/normal_604d803443a72.pdf
    • https://cdn-cms.f-static.net/uploads/4413373/normal_6069751b1af0a.pdf
    • https://nowabarabowuxo.weebly.com/uploads/1/3/4/3/134319250/8686169.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://madigekole.onlinewebshop.net/zofigasirelisekejo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf6.bin
8cb5eb0bcdd1f16d02429bb664b5a21db796406f7c78f7894524aef8347d97c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 5016 bytes
font_01_sfnt_off0000fee1.bin
d5ad57a293fd469c2e30a6504fa7e542e03c8c8caa09c02acc6b1bc2a6d12b85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE1 11120 bytes

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