Malicious PDF — malware analysis report

Static analysis result for SHA-256 52eb8844e545e061…

MALICIOUS

PDF

70.9 KB Created: 2021-03-24 03:09:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f4580d763d2223beba71098d89b2141 SHA-1: ba3162216d8e101e2ebdaeba8fb53def6992c410 SHA-256: 52eb8844e545e061cdbc58c93595e877e01e44fd73eaa67894d5b3becd9d1747
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be related to search results for educational materials, suggesting a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=wordly+wise+3000+book+6+test+pdf
    • https://cdn-cms.f-static.net/uploads/4374542/normal_604de06b30dd7.pdf
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5fda30a753304.pdf
    • http://gusebozaromurel.mypressonline.com/23324733104.pdf
    • https://cdn-cms.f-static.net/uploads/4379387/normal_600d9fe5e5ffa.pdf
    • https://cdn-cms.f-static.net/uploads/4409396/normal_5fd78b0064769.pdf
    • http://rasipafus.getenjoyment.net/lotokigizavuzubum.pdf
    • https://cdn-cms.f-static.net/uploads/4495696/normal_5fd2fe0289522.pdf
    • http://pubolovuwete.iblogger.org/charlotte_tilbury_magic_foundation_shade_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_700c001d3ed4401d902dabcd6b2c5e9d.pdf?index=true
    • http://varoxekoduv.epizy.com/photon_browser_premium_apk_free.pdf
    • http://tukuponuvul.epizy.com/how_to_solve_ch_10_error_in_lg_ac.pdf
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_58e8ee82bbc5419f8d45f7a6cdf385af.pdf?index=true
    • http://pujukejesoteja.epizy.com/80581910779.pdf
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_e52ca1b733084955849afc31539c4788.pdf?index=true
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_a51dd557a96849cf9a5c4acd533b1b5d.pdf?index=true
    • http://boraxatisota.rf.gd/premiere_pro_templates_nulled.pdf
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_19930aa33ae94afc9f33ce9b19b27e29.pdf?index=true
    • http://wotekobadukabuz.rf.gd/business_idea_development_process.pdf
    • http://fizopifiluja.epizy.com/beturafojusamuwubuwuj.pdf
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_dc0887077743430aae6bbea4ad856073.pdf?index=true
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_75d2ae95f6c3467c8cfc50e7b07ee65b.pdf?index=true
    • http://rotufixijisadi.onlinewebshop.net/somutagutixadanokomipala.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec8.bin
453602e27ba138831052a8b7adf49166ddef8840956fdc34d7b4222b656940b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC8 5696 bytes
font_01_sfnt_off0000f255.bin
488e6404deb0c66f58c53bdc5f3f3877614b9358907e29d57a620427378845d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 10392 bytes