Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b0226cb5da56cc…

MALICIOUS

PDF

81.2 KB Created: 2021-03-30 01:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 52c71cb2e477212511e674f8b70e9dde SHA-1: 279c8b94cafaa34aca0176db315381cfc3f1df7f SHA-256: 84b0226cb5da56cc8274dc64651dfc8f3c5ed23ccad51e04303c78515fd259d7
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous external URIs, with one prominent URL pointing to 'nipisod.ru', suggesting a phishing or malware distribution attempt. The presence of many links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=soda+stream+refill+gas+near+me PDF link annotation
    • https://cdn.sqhk.co/kubepugemaki/ieChhhj/22153122113.pdfIn PDF document text
    • http://priz24.site/dukisofiwi2v310.pdfIn PDF document text
    • http://texno3ua.com/10609080584fqm6f.pdfIn PDF document text
    • https://cdn.sqhk.co/fedugaxoloz/jjjehi6/62941833452.pdfIn PDF document text
    • http://trenketo.buzz/lawn_boy_4_cycle_mower_wont_startmuaih.pdfIn PDF document text
    • http://depafelevan.22web.org/wastewater_treatment_nptel.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/m19gdic/blackpink_dream_tiles_piano_magic_kpop_download.pdfIn PDF document text
    • http://malespw.xyz/vidoxazanokokogund754.pdfIn PDF document text
    • http://wiinorama.fun/vuwabhmqid.pdfIn PDF document text
    • http://winfreeiphone.xyz/jutafesokurowo4yjrp.pdfIn PDF document text
    • http://naturwow.space/bejeweled_classic_apk_download9aanw.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/tozaduliwubega/72863922532.pdfIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_f82d18b212934aba8ca0d308b055805c.pdf?index=trueIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_bd29c032490d4ee7b533dcb0264a9236.pdf?index=trueIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_75cba3df6411451e916a6c2310e6cb58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gedexim/dbx_stock_ticker.pdfIn PDF document text
    • http://luwemazezabubat.rf.gd/o_level_mathematics_past_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/28788545658.pdfIn PDF document text
    • http://zupotid.epizy.com/apache_lucene_book.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_e8ccd591b48b4d278db0b37cb6e89c6a.pdf?index=trueIn PDF document text
    • http://pukevekoba.rf.gd/guidewire_claimcenter_api.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_off0000fe9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9D 5332 bytes
SHA-256: 2f97b2df6897eec7e1ddd15123630ecf0097e246bcb2187188dc285f0a0a8f8a
font_01_sfnt_off000110a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A5 10988 bytes
SHA-256: 4a920d21804e03cb40db110e61c7df8b94b3d6057018ab48f497de4cc0c77a79

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