Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbead424a78ae1c1…

MALICIOUS

PDF

76.2 KB Created: 2021-04-11 03:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9539c2227e515387f83d7779020c10e4 SHA-1: 7515c02e01999148ea21647fe2ed35c58f156e41 SHA-256: fbead424a78ae1c125a217f4ec4ca8b6c5adb2eb09641159e4151719108e835b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://pelibifir.ru/strik?utm_term=rosemount+3051+dp+transmitter+catalogue PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413842/normal_60034d1aaa1ee.pdfIn PDF document text
    • http://natnat.fun/33893563137ssxte.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/mQ2PyOP/new_house_construction_cost_spreadsheet.pdfIn PDF document text
    • http://nifibegiro.iblogger.org/o_reilly_architecting_modern_data_platforms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450640/normal_5febf5b92271f.pdfIn PDF document text
    • http://livethailand.fun/wordly_wise_3000_book_10_lesson_1_answer_keyulahd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485308/normal_5fcc21dc77c18.pdfIn PDF document text
    • http://fasodotujane.iblogger.org/wepenodes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_600d9df8e2871.pdfIn PDF document text
    • http://buybritishcat.com/pdf_english_grammar_in_use_raymond_murphyko139.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwasazafu/UHYgeie/88881578219.pdfIn PDF document text
    • http://good-production11.site/pilopodujix8rq33.pdfIn PDF document text
    • http://uscreditmonitoring.info/95994777445bnulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6651cd74-b03f-4e62-a249-7f3943263914/berserk_manga_volume_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b97cd7-7d43-4e70-98f2-b8840b87ba52/xamukapalumuxolaxiz.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/22024855324.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/central_machinery_drill_press_model_726_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79db9fb-87ce-4202-a358-69b93f73f9de/what_is_christian_morality_essay.pdfIn PDF document text
    • http://sorebetole.epizy.com/ziwimit.pdfIn PDF document text
    • http://disorasejazamu.epizy.com/diccionario_biblico_cristiano_reina_valera.pdfIn PDF document text
    • http://nesuvumuvugelo.epizy.com/57437073936.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_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 5880 bytes
SHA-256: 298bd0f170e2c3dd43b1c5682cb7358b20b39a82c63fef2951389f6d46435e7d
font_01_sfnt_off0000ffe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE3 10660 bytes
SHA-256: e72406dd3f1db73aaf06de63f2421853264c2f0875f82e94b629ca7361a01396

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