Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e25791a9059b09…

MALICIOUS

PDF

69.1 KB Created: 2021-05-08 11:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67c54eb50121303feb3d7e86730197bb SHA-1: 2d5a9f59d55f7cb3af5b89f1cbe50b15cec0e90c SHA-256: 77e25791a9059b096417f29ed9302b33390be48d221c2585164605e33d842189
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. One of these URLs, 'https://mezovuduw.ru/strik?utm_term=painting+easel+stand+hobby+lobby', is directly embedded and likely serves as a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=painting+easel+stand+hobby+lobby
    • https://cdn-cms.f-static.net/uploads/4454971/normal_603c037fc57f0.pdf
    • http://yesstore.pro/lagekojan40q37.pdf
    • http://vnds-super.space/agile_project_management_training_near_me785wn.pdf
    • https://pazelofigo.weebly.com/uploads/1/3/4/5/134588761/2a8ddf.pdf
    • https://cdn-cms.f-static.net/uploads/4392864/normal_603155d087633.pdf
    • https://cdn-cms.f-static.net/uploads/4401558/normal_6034d2994733c.pdf
    • http://davusivit.22web.org/89005496250.pdf
    • https://lepefolavexar.weebly.com/uploads/1/3/0/8/130874674/bobem_julosijor_noxoko.pdf
    • https://cdn-cms.f-static.net/uploads/4475719/normal_6051186415580.pdf
    • http://vzruvayarttraff.xyz/what_causes_cohesion_and_surface_tension9uwx5.pdf
    • https://cdn-cms.f-static.net/uploads/4491451/normal_6066970d484e2.pdf
    • http://ilook.market/hampton_bay_model_ac-552_manualaop9u.pdf
    • https://static.s123-cdn-static.com/uploads/4421472/normal_5fcf817c57577.pdf
    • http://idealica-italiaufficiale.site/hp_envy_5530_printer_server_connection_errorq8ibe.pdf
    • http://ing-jobs-opportunities.com/arduino_programming_languagevqc21.pdf
    • https://befunopokoxa.weebly.com/uploads/1/3/5/3/135327779/luferogaw.pdf
    • https://cdn-cms.f-static.net/uploads/4379610/normal_6040c38a75167.pdf
    • http://aires.fun/genudogekosoqniri.pdf
    • https://cdn-cms.f-static.net/uploads/4473963/normal_6013ea5077c26.pdf
    • https://cdn-cms.f-static.net/uploads/4374371/normal_60607c4d345b3.pdf
    • https://static.s123-cdn-static.com/uploads/4424953/normal_60041467c03df.pdf
    • https://jitipukojid.weebly.com/uploads/1/3/4/7/134707402/fubuleripiboras_lexuvimeteko.pdf
    • http://expressday.online/metar_decoder_pk_wnduli2s.pdf
    • http://sexedate69.site/the_crucible_elizabeth_proctor_quote8fqvx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wafogaz.rf.gd/l_t_idpl_annual_report_2017.pdf
    • http://xorirefojexo.rf.gd/residential_interior_design_book.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cff6.bin
ff47a6ef3f1bed275b6e112550b97f1dc092bca38c872ede8bf6dfdf03dcbf4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF6 5236 bytes
font_01_sfnt_off0000e1c1.bin
eed99f90bdc81aa6dafa5ec4a02b3698b73e6af972f0c75c5dbe6af070a5acf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C1 10808 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.