Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6f1268d58f9fb9…

MALICIOUS

PDF

79.3 KB Created: 2021-03-29 21:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9a73c4e62df0909d4b1e580387784e7b SHA-1: 25a0050240dccb3dd507b6f071937595dcebd087 SHA-256: da6f1268d58f9fb936a2ee95c177d177cbcd6fb21e9240d556b95e7a14ffeeba
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lead users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/123?utm_term=old+phone+ringtone+apps PDF link annotation
    • https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/fef9500c33.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/ngidBjc/98891724900.pdfIn PDF document text
    • https://dujemezore.weebly.com/uploads/1/3/1/3/131381607/sutoxufujitedosop.pdfIn PDF document text
    • http://zefefiwova.medianewsonline.com/annexure_d_for_minor_passport_filled_sample.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/new_amharic_books_download.pdfIn PDF document text
    • http://aicberg.net/what_does_pre_production_mean_in_filmvgr9a.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/iiepBie/sonakafojawa.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/XXhbjhc/among_us_2_cancelled_steam.pdfIn PDF document text
    • https://damujulul.weebly.com/uploads/1/3/5/3/135335913/zewoganalaxoni-zabewaveg-nawimodoj-dujinoruj.pdfIn PDF document text
    • https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/8851b830f20ea.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/why_isnt_my_oven_lighting.pdfIn PDF document text
    • http://levantemosaic.com/wipelasubazetugewikimefivlbgf3.pdfIn PDF document text
    • https://xopozutafedas.weebly.com/uploads/1/3/1/4/131453480/bifom.pdfIn PDF document text
    • http://shoes-storie.club/they_say_i_say_3rd_edition_downloadp4x8t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/eaton_control_panel_design_guide.pdfIn PDF document text
    • http://todabopojexojad.epizy.com/39274551853.pdfIn PDF document text
    • http://fefawitot.rf.gd/68393606351.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/mizagagekufotutavegil.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/postscript_on_the_societies_of_control_sparknotes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7A 5036 bytes
SHA-256: 0b8d560cdc77350e9124832697662b8659f8baeabe18bd01b179198986a99f68
font_01_sfnt_off0000fc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC85 10848 bytes
SHA-256: cf79a81fa6e274ffb99be32cd48d7f3ad97a25660f7368a661f107646b6c9a21
font_02_sfnt_off000121bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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