Malicious PDF — malware analysis report

Static analysis result for SHA-256 aceaaaf15d019052…

MALICIOUS

PDF

77.5 KB Created: 2021-03-31 05:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: caba961a7c07922d35d64145fd702c87 SHA-1: d10e57ea070d4da26069b2480490123fa521e6e7 SHA-256: aceaaaf15d019052adcbf780546b521dd08cbaf1ab6a36f9aadd88ad203a0e95
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to compromised or malicious sites.

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://soxebez.ru/wix?keyword=ageless+body+timeless+mind+in+hindi+pdf
    • https://gazumewus.weebly.com/uploads/1/3/4/9/134901575/1912806.pdf
    • http://axecheat9.xyz/336153609287aq7s.pdf
    • https://cdn.sqhk.co/dukosisevu/dhb5xia/functional_analysis_transfer_pricing_template.pdf
    • http://jofifuneku.medianewsonline.com/data_analysis_using_ms_excel.pdf
    • http://50offstore.pro/how_to_clean_dr_brown_bottle_warmerai9mo.pdf
    • https://cdn.sqhk.co/befulirawid/FjecyMj/89732620642.pdf
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/48eda7.pdf
    • http://xofebuledat.scienceontheweb.net/60322218188.pdf
    • http://english-10.site/349039572238hwid.pdf
    • https://cdn.sqhk.co/zelosoza/Eihiajf/nasa_spacex_crew_dragon_mission.pdf
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/zilerepik_xolubikon_firutatorokanek.pdf
    • https://cdn.sqhk.co/gulanuwe/qThijgt/calendar_2021_february.pdf
    • http://rajeziriga.scienceontheweb.net/ripelu.pdf
    • https://nadagedo.weebly.com/uploads/1/3/1/8/131858166/1051668.pdf
    • http://instapodarok365.site/riddle_school_1_walkthrough1h9m9.pdf
    • https://cdn.sqhk.co/linewebozid/bji0Dha/losipageputafuliw.pdf
    • http://vienvozvrat.site/39314024811o3uaf.pdf
    • https://cdn.sqhk.co/pamezuravuno/qNidBid/yellowstone_season_4_finale_spoilers.pdf
    • https://cdn.sqhk.co/xudekutof/uGOkihj/bounce_house_with_slide_rentals_near_me.pdf
    • https://cdn.sqhk.co/bilexodofose/dhggjie/xelonubulasol.pdf
    • https://cdn.sqhk.co/winogolelog/5tkgcjd/49735815089.pdf
    • http://dosijefa.mypressonline.com/netoketumobekobexek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_c3ecd6d01211478f9e18ffd2b8f189a5.pdf?index=true
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_1a96b519b767405b95c68f93c008c657.pdf?index=true
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_545c56eebb364bec83ea35fa5b87caef.pdf?index=true
    • http://solugivewatewa.myartsonline.com/ps4_gold_wireless_headset_bluetooth_dongle.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_off0000f0e4.bin
41223e5b79c7db7f10f91e56f63be615257e615fc67baaca36ea7791950a4e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 5380 bytes
font_01_sfnt_off00010315.bin
95a1f77fc33305e98dd8fe2264cc67389f73018eceabac003230bfc51b5c8c97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 10840 bytes

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