Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea16211a689be60f…

MALICIOUS

PDF

76.4 KB Created: 2021-03-23 03:11:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1cfd394f5dcaeb6d70e937aba0486762 SHA-1: 87ef89b210c4e57bbce022bff6f2e88692f6ea2e SHA-256: ea16211a689be60ff6de1db2b1ddee07a1b614b585f3d838469a9de5cad25a0c
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 0.9996

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://pelibifir.ru/strik?utm_term=army+jrotc+drill+team PDF link annotation
    • https://cdn.sqhk.co/jerivudofin/5Lvojep/xolebibesipid.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/pelegadexoziwavetip.pdfIn PDF document text
    • http://welakeriduxu.22web.org/mechanical_engineering_projects_for_high_school_students.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/eVMIfM6/fupugosokuzuv.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/how_to_trade_the_daily_forex_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/foxenikap/Yvijcbo/bazz_song_2018.pdfIn PDF document text
    • http://vefefex.iblogger.org/70003427768.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/74517157990.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/iPDTkie/avoided_poor_internet_connection_android_solution.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_d95dd256b7524713ab2dc4e05615e289.pdf?index=trueIn PDF document text
    • http://lewalogedo.epizy.com/33862543291.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/fusidixusofanav.pdfIn PDF document text
    • http://donejozatit.rf.gd/hamilton_beach_dual_breakfast_sandwich_maker_with_timer_silver_25490a.pdfIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_c83b2776af91456d8b403fabad42107b.pdf?index=trueIn PDF document text
    • http://lidikulogape.rf.gd/kelulepidanonilonijif.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/62035244121.pdfIn PDF document text
    • http://tibamupebunod.atwebpages.com/67281386634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23d16d7b-e840-4126-99af-4275314e6483/nuruw.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/77026875615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb78f4f5-1db3-4594-b545-50df99657ab0/dalipevodexabigo.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/how_to_apply_for_food_stamps_pandemic.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_off0000eea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA5 5076 bytes
SHA-256: 03d81891525c6b3056538ca2325ed30555a23c09f1946c60cf35d36e9b4a6a5f
font_01_sfnt_off0000ffdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDC 10828 bytes
SHA-256: 3030b59813f0a8aec7270acbf69c24423fabc231ec72ab03902f1c8fa7706e5f

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