Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c92c8d7eabad140…

MALICIOUS

PDF

84.6 KB Created: 2021-03-21 23:24:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bd1d4f1ec5a967917b95157d9b04726 SHA-1: b209162a27636c565bbf37b4481f2ec557a53be4 SHA-256: 4c92c8d7eabad140b2c2a17d055b577336ab4bb9d7152eee3580b4405ea41921
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to a suspicious domain, combined with the document's metadata suggesting it's a PDF, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself likely contains obfuscated content or exploits to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=unit+8+right+triangles+and+trigonometry+answers+gina+wilson+2014
    • http://klossheff.xyz/8616135257fwqz5.pdf
    • https://cdn.sqhk.co/letarezetap/yziikgg/lutejufe.pdf
    • https://cdn.sqhk.co/nobipajami/bhjehao/1945128542.pdf
    • https://cdn.sqhk.co/valumikeg/80IpZih/pobomotapogaxezovuk.pdf
    • http://domainlimax.xyz/tuxixeximovasazixugyhg85.pdf
    • http://okclub.org/17020746095bx17e.pdf
    • http://firstflirts.site/562048541074k95s.pdf
    • http://busivel.xyz/ropejabubepepurujusiradewbshw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tesasubawalozan/history_of_the_bible_canon.pdf
    • http://nusilemil.epizy.com/sql_server_2017_format_code.pdf
    • https://s3.amazonaws.com/rebesudanolo/hurt_feelings_report_fillable.pdf
    • http://tunowik.epizy.com/bin_file_extractor_android.pdf
    • http://nixuverojezuluz.epizy.com/album_video_song_kannada.pdf
    • http://fufabufitilaf.epizy.com/kasifegosoxaje.pdf
    • https://s3.amazonaws.com/febopa/grade_7_math_worksheets_free.pdf
    • https://s3.amazonaws.com/wolina/96402995771.pdf
    • http://borogibapomad.epizy.com/systematic_random_sampling_adalah.pdf
    • http://xifusejikudit.rf.gd/yamaha_motif_xs6_manual_espaol.pdf
    • http://mamesejo.epizy.com/software_cracking_tools.pdf
    • https://s3.amazonaws.com/miwolezedubujoz/bollywood_movie_site_name_list.pdf
    • https://s3.amazonaws.com/dalava/half_of_odd_numbers_worksheet.pdf
    • http://bavodokebak.rf.gd/balawan_semua_bisa_bilang.pdf
    • https://s3.amazonaws.com/zozuxukoxo/assassin_s_creed_unity_trailer_song.pdf
    • http://goruwon.epizy.com/lumufojajonuxinaxesek.pdf
    • http://jusumexavajuzin.epizy.com/20941830917.pdf
    • https://s3.amazonaws.com/poguvelefa/plain_bed_sheets_online_india.pdf
    • https://s3.amazonaws.com/petuzutemixuvod/master_plannery_puttur_information.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a7.bin
64fa6624ef5ecf1a8ee83e7d3504c6a98f2e220f44098732d2b9e7ca12410fd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 6032 bytes
font_01_sfnt_off0001061e.bin
cbdef18752492cdd5f15acf0ff1f518a34b5d46490eae838fd7806a30d167f16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1061E 12024 bytes
font_02_sfnt_off00012f0a.bin
f3b752e25d2e3098dc5b351a512c5ca672d2b137fcb7ddb3f81b2384be51d5c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0A 16072 bytes

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