Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7d1bcf01d317b8…

MALICIOUS

PDF

68.0 KB Created: 2021-03-26 18:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 507d62e5bc009e791d31e5720029c504 SHA-1: 7c7293a420d455307fb0c2c9752e67d889829ab3 SHA-256: 1b7d1bcf01d317b88f385f20a3596f458cdd86079ede8c06399ababbe285f42b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware. The document body, though heavily obfuscated, suggests a lure related to a book search.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/award?keyword=biblia+de+estudio+para+la+mujer+pdf
    • http://ttttrrrr.space/vawasuwusupitagasomiboxe4vha.pdf
    • http://rijeruzejolovo.22web.org/44341954983.pdf
    • http://noksipals.online/resoda14sq0.pdf
    • http://exampl1214.com/387671043138ci0h.pdf
    • http://zigoramad.iblogger.org/drawing_conclusions_worksheet_5th_grade.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kadegezopofog.rf.gd/index_match_function_excel_different_sheets.pdf
    • https://s3.amazonaws.com/wukara/aruvam_movie_in_tamil_hd.pdf
    • http://diwimibafufesas.rf.gd/rakinesamotijag.pdf
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_d0c92ba308cd46af98f02084925215e6.pdf?index=true
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_99ca928e1f634fd1b1a234c3302edd74.pdf?index=true
    • https://s3.amazonaws.com/dufekifaral/21606933599.pdf
    • http://sufazomewugexu.epizy.com/non_chronological_reports_year_4_success_criteria.pdf
    • https://uploads.strikinglycdn.com/files/22b14be3-dee6-4d9d-826f-09c9d1b0a4b1/descargar_biblia_de_estudio_thompson_para_android_gratis.pdf
    • https://s3.amazonaws.com/wazotojemov/7_series_samsung_tv_remote.pdf
    • http://fekuzigide.epizy.com/63777082715.pdf
    • http://tagabeweme.epizy.com/47927809389.pdf
    • https://s3.amazonaws.com/legenapi/divergent_free_ebook.pdf
    • https://uploads.strikinglycdn.com/files/e174a69a-e037-4b9f-9e41-3bcd0706cbee/67196184430.pdf
    • https://uploads.strikinglycdn.com/files/41ede2af-89e3-404e-8099-0cc33223079d/can_you_get_hearing_aids_at_costco_without_a_membership.pdf
    • http://nimuwixoxuwe.epizy.com/2836623861.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_off0000c6de.bin
f4d1419b1048917d316848567a01f581aec629e7c1e03e2a68592c06de9f3f6d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DE 5452 bytes
font_01_sfnt_off0000d94c.bin
15c1f5b7084c35b1ad597ba0c4dbd5b05a9a22aeb4963fb5dcfb66eacdf58424
pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 12244 bytes