Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db9de40e2dbe299…

MALICIOUS

PDF

83.0 KB Created: 2021-02-21 07:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 513cb352bebf11d26ba1382639ea8f28 SHA-1: 859b25f8ffdc634032a034df82edec51a2638847 SHA-256: 6db9de40e2dbe29909ca6f990321647670515a00f4bc84c28004f43c2abcde8e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/strik?utm_term=baby+einstein+neighborhood+symphony+activity+jumper+instructions PDF link annotation
    • https://gupexududoteg.weebly.com/uploads/1/3/5/3/135302954/vapelolitumoxof-lizalor-nazawabizezog-ramogimebavu.pdfIn PDF document text
    • http://supportcopyright.net/retro_11_pink_snakeskin_release_dategvy62.pdfIn PDF document text
    • https://fiwinibikevuli.weebly.com/uploads/1/3/5/3/135339450/7b3d76d7.pdfIn PDF document text
    • http://souve.me/85727245671isgi0.pdfIn PDF document text
    • http://moitender.org/funugumawakorombz9k.pdfIn PDF document text
    • http://segowesilo.iblogger.org/12626368222.pdfIn PDF document text
    • https://xijutenidipes.weebly.com/uploads/1/3/0/7/130775364/kadiva.pdfIn PDF document text
    • http://getcreditcheck.info/nelifomoxekoveruk95j.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/xexazuralog_venixewege.pdfIn PDF document text
    • https://muzekulukusutaw.weebly.com/uploads/1/3/5/2/135296419/sazis.pdfIn PDF document text
    • http://openplafond.xyz/juxexoseletqb8nd.pdfIn PDF document text
    • http://spain50off.info/watch_my_movies_on_apple_tvl3pkl.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/gehgk4S/dark_side_of_the_moon_album_cover_poster.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/EhdzuKD/38567897968.pdfIn PDF document text
    • http://nncucuucuc.space/how_to_make.homemade.pizzaeblqg.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/1N7HkX8/69627621469.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/gjetg7R/jopedipe.pdfIn PDF document text
    • http://tinivoze.22web.org/transformers_the_last_knight_barricade_death.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bazibataz.epizy.com/ir_spectroscopy_principle_instrumentation_and_applications.pdfIn PDF document text
    • http://kotidaw.epizy.com/zepoju.pdfIn PDF document text
    • http://gipipirerogarul.rf.gd/grid_template_columns_calc.pdfIn PDF document text
    • http://simipibenafar.epizy.com/27375096580.pdfIn PDF document text
    • http://kewivifonawati.epizy.com/congolese_gospel_music_free.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_off0001019d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019D 5880 bytes
SHA-256: e810044e1776089bca9d51106271b65993a88b26eb6c6ee9100a4a4b7454de3b
font_01_sfnt_off00011586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11586 11936 bytes
SHA-256: d15d816728528d1c719320e73b9b25b03482a3c15e9313fc6b06c45adca63f75

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