Malicious PDF — malware analysis report

Static analysis result for SHA-256 8765c158069da300…

MALICIOUS

PDF

75.9 KB Created: 2021-03-28 05:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf4c6b8715a2d698ddebbf78d4b56000 SHA-1: 95b8dd4abb433fec3bc88d980587c54ac893f632 SHA-256: 8765c158069da300832184ad83b9fb6ed539d99e4f298e44ecc6ac587efa646d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Nintex workflow sharepoint 2016 examples', suggesting a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://vilenefex.ru/strik?utm_term=nintex+workflow+sharepoint+2016+examples
    • http://epaytds.xyz/7882928013558cu7.pdf
    • https://static.s123-cdn-static.com/uploads/4453732/normal_5fcbd1815a9ba.pdf
    • http://getveran.site/jimogipivovegotuwumasurasnukz3.pdf
    • http://wonnaturila.space/high_thread_count_sheets_worth_it1cwfd.pdf
    • http://sajutasure.22web.org/dujojumudazuwobuxeburija.pdf
    • https://cdn.sqhk.co/xinefegepe/iKv48jc/viticulture_classes_online.pdf
    • https://cdn-cms.f-static.net/uploads/4368770/normal_60243bb0e56e4.pdf
    • https://cdn-cms.f-static.net/uploads/4491451/normal_602f2697718dc.pdf
    • https://cdn.sqhk.co/naruxibe/j4H8SDP/cyber_security_3rd_party_information_security.pdf
    • https://cdn.sqhk.co/xefijumu/idv5eYN/nostalgia_cotton_candy_maker_replacement_extractor_head.pdf
    • https://cdn.sqhk.co/dedenijikal/jft0Zie/91475346931.pdf
    • https://cdn-cms.f-static.net/uploads/4494661/normal_6035b13b52e2e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xukirizugukugi/ics_100_course_answers.pdf
    • https://s3.amazonaws.com/bubisifapagefe/bikroy_apk_premium.pdf
    • https://s3.amazonaws.com/polojuliragam/comparative_market_analysis_template_excel.pdf
    • http://ritopagagibuxu.epizy.com/fupenagaxapomosolululivit.pdf
    • https://s3.amazonaws.com/dezajok/jeresotejuxiga.pdf
    • https://s3.amazonaws.com/zalomi/wexiriv.pdf
    • https://s3.amazonaws.com/jubiferekaka/why_does_low_carb_stopped_working.pdf
    • https://s3.amazonaws.com/kagedatabujo/assassin_s_creed_3_deluxe_dlc_pack.pdf
    • https://s3.amazonaws.com/benuka/focusrite_saffire_pro_40_adat_setup.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_off0000e863.bin
ebeebe97b140b0c9a4376aea30187f6718bcb746de3961f3f2369fe862b6633c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE863 5812 bytes
font_01_sfnt_off0000fc2c.bin
6483d6fe5ca6a3f2a7d72ef659b1da283701e05de7fdef614d1ac02cfbae109e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 10976 bytes