Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1b3b7b1de7093d…

MALICIOUS

PDF

74.1 KB Created: 2021-03-19 11:49:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0facfe0dc9e92ed6c0616ac30db74843 SHA-1: 7216d61af60c4ec7f7b28e9cdebefef832314fec SHA-256: 0b1b3b7b1de7093d50f765a1e11a5cc3de67f0144bdd44925446f98f488e5270
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a notable one pointing to `https://mezovuduw.ru/strik?utm_term=onkyo+remote+codes`, suggesting a phishing or malware distribution lure. The PDF structure and the presence of embedded URIs are consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=onkyo+remote+codes PDF link annotation
    • http://lamakexo.scienceontheweb.net/how_to_replace_the_igniter_on_a_furnace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_604f47a27f468.pdfIn PDF document text
    • http://mepanawabopod.22web.org/nasdaq_bx_port_request_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380863/normal_6005bbbe6c393.pdfIn PDF document text
    • http://warewakeb.sportsontheweb.net/beauty_and_the_beast_piano_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_60336e569ea23.pdfIn PDF document text
    • http://golepikoxeware.22web.org/zatesorapip.pdfIn PDF document text
    • http://gatofupimekow.mywebcommunity.org/20597853523.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/Ogev3hd/wechat-_group_voice_chat_rooms.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/V7hiij8/spider_stickman_fighting_warrior_mod_apk.pdfIn PDF document text
    • http://memexeti.66ghz.com/75819443123.pdfIn PDF document text
    • http://timinome.getenjoyment.net/puxifazadetelojavub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494874/normal_604319785457c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://somupoxalinarek.rf.gd/baofeng_uv-5r_chirp_mac.pdfIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_37717df8729d42d7a1f88197a5292cd1.pdf?index=trueIn PDF document text
    • http://pimekawuxa.epizy.com/kontraste_die_reporter_grlitzer_park.pdfIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_62c813f5598b493cad4ad4d47a7d55df.pdf?index=trueIn PDF document text
    • http://lojurixerura.epizy.com/android_tablet_emulator_windows_10.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_8f1ed97a91c24a7c98bd570fad7cae15.pdf?index=trueIn PDF document text
    • http://jimotomalugeji.rf.gd/stacked_waterfall_chart_excel_2010_template.pdfIn PDF document text
    • http://luwulifinuneti.epizy.com/sound_meter_app_iphone.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_off0000e48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48E 5036 bytes
SHA-256: c54e5ebf0ea587b243fc9fa74fbfa0c28f796a3f9dd272aabcd5ed0042fd57a7
font_01_sfnt_off0000f5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A4 11136 bytes
SHA-256: 327fbc730797804adde6c9fe0fcda4b7cef60ba05dc143a86ef5e5652c8e72de

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