Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b8c1bec96ef760…

MALICIOUS

PDF

77.4 KB Created: 2021-03-15 21:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8844389469bfe74645bb3bdfedaa58d SHA-1: 4bcc8f9bda39140768bcee39c7fc975d68bd1e4b SHA-256: b6b8c1bec96ef7605e4ab831e22807be5cabb47f4ef888b40a91561dad3cc9fa
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely used to host a malicious payload or phishing content. The document body, though heavily obfuscated, suggests a lure related to 'Basic sentence structure in english ppt', indicating a social engineering attempt to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=basic+sentence+structure+in+english+ppt
    • https://static.s123-cdn-static.com/uploads/4446923/normal_5fff3fa09dd9b.pdf
    • http://xufededubumavif.scienceontheweb.net/witexoxedaxoxin.pdf
    • http://newuwedeza.mypressonline.com/catching_fire_full_movie_free_download.pdf
    • http://lebepufu.mypressonline.com/japanese_grammar_textbook.pdf
    • https://cdn-cms.f-static.net/uploads/4463306/normal_602d410886705.pdf
    • https://cdn-cms.f-static.net/uploads/4412170/normal_5fd899882b471.pdf
    • https://static.s123-cdn-static.com/uploads/4474176/normal_5fce2cbbbc8f3.pdf
    • https://cdn.sqhk.co/jesovolavig/sicDhaF/american_women_s_basketball_tournament_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4497395/normal_603de8dc9151c.pdf
    • https://cdn.sqhk.co/xefijumu/hiLjidS/nesewutopepomenerenilo.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/97792d3b-6ffc-45e0-813a-ca8b92259106/ti_84_calculator_charger_walmart.pdf
    • https://uploads.strikinglycdn.com/files/c9f00229-5fac-469b-a447-1a37faf7a9de/what_does_the_bible_say_about_following_mans_laws.pdf
    • http://defasawune.epizy.com/70605150230.pdf
    • https://uploads.strikinglycdn.com/files/341154b0-9f29-4784-a379-f555c91c21df/marathi_law_books_free_download.pdf
    • http://rurebirafana.epizy.com/1779522371.pdf
    • http://bavevex.onlinewebshop.net/zejojo.pdf
    • http://romudiforexove.epizy.com/converting_linear_equations_into_standard_form_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/10fd6e4f-692a-4e18-b75a-8cbc6af772a5/what_is_the_role_of_court_in_criminal_justice_system.pdf
    • http://mubozezubudiz.rf.gd/tunedo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e776.bin
5cceb361c4647b10f7aa70f216b3ded79b1441b8b981f05084cbaa307744cf1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE776 1956 bytes
font_01_sfnt_off0000f0d2.bin
9d557a4816989a62633173a6fe19f866ff6082ef609a074e433ec6142f83385f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D2 5244 bytes
font_02_sfnt_off000102a4.bin
c4ea5590b77aabf1988a4d8338f89e498810337a8c2d42859ecd25abc6a64ba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A4 10908 bytes

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